[llvm] [AMDGPU][True16][CodeGen] legalize 16bit and 32bit use-def chain for moveToVALU in si-fix-sgpr-lowering (PR #138734)

[Joe Nash via llvm-commits]

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

Thanks, it looks a lot better! Besides my small new comments LGTM.

https://github.com/llvm/llvm-project/pull/138734