[llvm] [AMDGPU][True16][CodeGen] update isel pattern with vgpr16 for 16 bit types (PR #154875)

[Brox Chen via llvm-commits]

broxigarchen wrote:

> scalar_to_vector.gfx11plus.ll

Oh, that's weird. Not sure how I miss it. Fix is here https://github.com/llvm/llvm-project/pull/157684/files

https://github.com/llvm/llvm-project/pull/154875