There's a merged pull request on the void-packages repository

mesa: reorg driver config to be mostly feature based + fixes
https://github.com/void-linux/void-packages/pull/21362

Description:
This makes sure we can simply turn on features on/off per arch
in one place and then never explicitly check architecture again.
Also makes turning features on/off easy.

This also goes back to the manual driver list, so that we aren't
subject to mesa randomly turning things on/off.

Also, always enable dri3 and glx=dri, this seems to be the default
anyway, but be explicit about it; on the other hand, control
enablement of gallium-va and other hwdec stuff properly.

Also fix dependencies of mesa-opencl.

Just PRing this so travis can run.