ubuntu@tegra-ubuntu:~/backports-ath10k-install/backports-3.10.19-1$ make KLIB=/usr/src/linux-grinch-21.3.4 defconfig-ath10k
/--------------
| Your kernel headers are incomplete/not installed.
| Please install kernel headers, including a .config
| file or use the KLIB/KLIB_BUILD make variables to
| set the kernel to build against, e.g.
|   make KLIB=/lib/modules/3.1.7/
| to compile/install for the installed kernel 3.1.7
| (that isn't currently running.)
\--
make: *** [defconfig-ath10k] Error 1
ubuntu@tegra-ubuntu:~/backports-ath10k-install/backports-3.10.19-1$ make defconfig-ath10k KLIB=/usr/src/linux-grinch-21.3.4
/--------------
| Your kernel headers are incomplete/not installed.
| Please install kernel headers, including a .config
| file or use the KLIB/KLIB_BUILD make variables to
| set the kernel to build against, e.g.
|   make KLIB=/lib/modules/3.1.7/
| to compile/install for the installed kernel 3.1.7
| (that isn't currently running.)
\--
make: *** [defconfig-ath10k] Error 1
ubuntu@tegra-ubuntu:~/backports-ath10k-install/backports-3.10.19-1$ make defconfig-ath10k KLIB=/usr/src/linux-grinch-21.3.4 KLIB_BUILD=/usr/src/linux-grinch-21.3.4
Generating local configuration database from kernel ... done.
cc -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer   -c -o conf.o conf.c
cc -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer   -c -o zconf.tab.o zconf.tab.c
cc   conf.o zconf.tab.o   -o conf
#
# configuration written to .config
#
ubuntu@tegra-ubuntu:~/backports-ath10k-install/backports-3.10.19-1$ make
make[5]: `conf' is up to date.
#
# configuration written to .config
#
Building backport-include/backport/autoconf.h ... done.
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/compat/main.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/compat/compat_atomic.o
  LD [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/compat/compat.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/main.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/status.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/sta_info.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/wep.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/wpa.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/scan.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/offchannel.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/ht.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/agg-tx.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/agg-rx.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/vht.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/ibss.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/iface.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/rate.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/michael.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/tkip.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/aes_ccm.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/aes_cmac.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/cfg.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/rx.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/spectmgmt.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/tx.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/key.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/util.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/wme.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/event.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/chan.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/trace.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mlme.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/led.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mesh.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mesh_pathtbl.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mesh_plink.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mesh_hwmp.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mesh_sync.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mesh_ps.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/pm.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/rc80211_minstrel.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/rc80211_minstrel_ht.o
  LD [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mac80211.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/core.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/sysfs.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/radiotap.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/util.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/reg.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/scan.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/nl80211.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/mlme.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/ibss.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/sme.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/chan.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/ethtool.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/mesh.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/ap.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/trace.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/wext-compat.o
  CC [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/wext-sme.o
  LD [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/cfg80211.o
  Building modules, stage 2.
  MODPOST 3 modules
  CC      /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/compat/compat.mod.o
  LD [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/compat/compat.ko
  CC      /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mac80211.mod.o
  LD [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mac80211.ko
  CC      /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/cfg80211.mod.o
  LD [M]  /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/cfg80211.ko
ubuntu@tegra-ubuntu:~/backports-ath10k-install/backports-3.10.19-1$ sudo make install
[sudo] password for ubuntu: 
  Building modules, stage 2.
  MODPOST 3 modules
  INSTALL /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/compat/compat.ko
  INSTALL /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/mac80211/mac80211.ko
  INSTALL /home/ubuntu/backports-ath10k-install/backports-3.10.19-1/net/wireless/cfg80211.ko
  DEPMOD  3.10.40-grinch-21.3.4
depmod will prefer updates/ over kernel/ -- OK!
Note:
You may or may not need to update your initramfs, you should if
any of the modules installed are part of your initramfs. To add
support for your distribution to do this automatically send a
patch against "update-initramfs.sh". If your distribution does not
require this send a patch with the '/usr/bin/lsb_release -i -s'
("Ubuntu") tag for your distribution to avoid this warning.

Your backported driver modules should be installed now.
Reboot.