profile.d: Enable NIR compiler in etnaviv

This appears to fix graphical issues in Firefox and allows
GPU acceleration to work under XWayland.
5 jobs for etnaviv-nir in 4 minutes and 28 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #367411
librem5
shellcheck

00:00:23

 
  Package
passed #367412
librem5
package-pureos-byzantium

00:00:49

passed #367413
librem5:arm64
package-pureos-byzantium:arm64

00:02:04

 
  Test Package
passed #367414
librem5
autopkgtest-pureos-byzantium-package

00:03:14

passed #367415
librem5
lintian-pureos-byzantium-package

00:00:39