[llvm] [AMDGPU][AMDGPURegBankInfo] Map S_BUFFER_LOAD_XXX to its corresponding BUFFER_LOAD_XXX (PR #117574)

[Jay Foad via llvm-commits]

https://github.com/jayfoad approved this pull request.

Thanks!

This is a bug fix so _maybe_ it should be backported to 19.1.x. But I guess no-one is using GlobalISel for real, so maybe it does not matter.

https://github.com/llvm/llvm-project/pull/117574