[llvm] [AMDGPU][True16][CodeGen] Update and/or/xor codegen pattern for i16 (PR #121835)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> Are there any tests for the xor and or patterns that could be exposed by a true16 test runline?

There must be 

https://github.com/llvm/llvm-project/pull/121835