Currently intel-media-driver exports LIBVA_DRIVER_NAME=iHD globally, which is
not needed on a single gpu system and actively annoying on a multigpu system
where all the GPUs aren't Intel.

I can't think of any good reason why we need to set this, and if we do for
whatever reason then we should put it on a different package and install it via
recommends so people that have multiple GPUs and don't want to always be using
Intel can just lock the package.