Update Nvidia's xorg driver for Linux on shield tablet needed

Dear Sirs,

the driver ‘/usr/lib/xorg/modules/drivers/nvidia_drv.so’ doesn’t work with newer X Server 1.18, caused by different EABI versions! :-(

I use arch linux for arm on the shield tablet.
Is it possible to get source code for this driver (taken from L4T R21.4)?
I’d recompile it by myself!

Kind Regards
Michael