[llvm] [AMDGPU][True16][CodeGen] minmax pattern only for GFX11+ (PR #130786)

[Brox Chen via llvm-commits]

broxigarchen wrote:

> test?

Hi Matt. We only test this minmax pattern in GFX11plus as we should.

This is fixing an issue that this pattern is not guarded by GFX11plus predicate by mistake

https://github.com/llvm/llvm-project/pull/130786