[llvm] [AMDGPU] Correctly insert s_nops for dst forwarding hazard (PR #100276)

[Pravin Jagtap via llvm-commits]

https://github.com/pravinjagtap commented:

Before merging we need to unify the code in downstream branch so that merging will be less painful.

https://github.com/llvm/llvm-project/pull/100276