[llvm] [AMDGPU] Insert waitcnt for non-global fence release in GFX12 (PR #159282)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> [6773269](https://github.com/llvm/llvm-project/commit/677326999f270395ecaec026178fe7ed148a0068)

The policy was designed to specifically allow this 

https://github.com/llvm/llvm-project/pull/159282