[llvm] [AMDGPU] fix up vop3p gisel errors (PR #136262)

[Juan Manuel Martinez Caamaño via llvm-commits]

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

Thanks for cleaning the commit history!

The changes look good to me and it seems the reviews have been addressed.

Unless anybody raises new concerns I think we can land this change.

https://github.com/llvm/llvm-project/pull/136262