[llvm] [AMDGPU] fix SIPeepholeSDWA optimization for fp16 (PR #109395)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> There are multiple similar instances in the final asm, are you suspecting similar issue with int8 as well?

You're just describing SDWA being used at all. This is not evidence of an issue on its own, it's supposed to be used.

https://github.com/llvm/llvm-project/pull/109395