pan/bi: Rename panfrost/bifrost -> panfrost/compiler
This is the compiler for both Bifrost and Valhall, and presumably future Mali GPUs too. Give it a more generic name so we can use the bifrost/ path for something a bit more specific.
For historical reasons the compiler's name is still "bifrost" and uses the
prefix bi_
. I think that's ok in the same way that i915 in the kernel supports
way more than just i915.
Signed-off-by: Alyssa Rosenzweig alyssa@collabora.com