[llvm] [AMDGPU][NFC] Prepare the MFMA hazard checks for per-producer windows (PR #225988)

[Shilei Tian via llvm-commits]

shiltian wrote:

https://github.com/llvm/llvm-project/pull/218363 Actually it has not been merged yet, but I'd expect that one to be merged first.

https://github.com/llvm/llvm-project/pull/225988