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