[llvm] [AMDGPU] Update pal metadata for v3.6 (PR #135196)

[Jay Foad via llvm-commits]

https://github.com/jayfoad commented:

So this is a bug fix for versions < 3.6, as well as a removal for version 3.6? The subject line makes it sound like you only changed 3.6.

https://github.com/llvm/llvm-project/pull/135196