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

[Shilei Tian via llvm-commits]

shiltian wrote:

Supposedly you can revert the revert to get the reapply.

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