[llvm] [AMDGPU] Replace hardcoded register class IDs with [[#]] (NFC) (PR #185402)

[Jay Foad via llvm-commits]

https://github.com/jayfoad requested changes to this pull request.

It's not a good idea to manually update checks that have been autogenerated. Your changes will get lost the next time they are regenerated.

https://github.com/llvm/llvm-project/pull/185402