[llvm] [AMDGPU][True16] relax d16-write-vgpr32 condition (PR #194477)

[Ryan Mitchell via llvm-commits]

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

I think this is good, except that I agree with Joe's point on the MI being added. 

This can all be improved a bit with a struct that assists these determineWait functions. I have something downstream I need to work on upstreaming related to this, so I'm ok with merging this as-is.

https://github.com/llvm/llvm-project/pull/194477