[llvm] [AMDGPU] Do not fold clamp when only one max source has modifiers (PR #224517)

[Arseniy Obolenskiy via llvm-commits]

aobolensk wrote:

> I'd keep the commuted test if it doesn't already exist

I double checked just in case, this test duplicate does not exist. reverted removal

https://github.com/llvm/llvm-project/pull/224517