[llvm] [AMDGPU][True16][MC] VOPC profile fake16 pseudo update (PR #113175)

[Brox Chen via llvm-commits]

broxigarchen wrote:

> There seems still some errors in the codeGen that I wasn't realize before. I will address those asap

Added back the missing source code change on inst selection and now the CodeGen test should be fixed

https://github.com/llvm/llvm-project/pull/113175