[clang] [llvm] [AMDGPU] Infer amdgpu-no-flat-scratch-init attribute in AMDGPUAttributor (PR #118907)

[Matt Arsenault via cfe-commits]

arsenm wrote:

> Supposedly you can revert the revert to get the reapply.

Yes. You can just revert the revert and force push the PR branch to replace it 

https://github.com/llvm/llvm-project/pull/118907