[llvm] [AMDGPU] Enable "amdgpu-uniform-intrinsic-combine" pass in pipeline. (PR #162819)

[Pankaj Dwivedi via llvm-commits]

PankajDwivedi-25 wrote:

> I think this should have gone there

I don't think that makes sense because OPM is deprecated for opt. Only use case right now for this patch is llc, that too soon will be completely moved to NPM.

> the IR test needs both new and old PM run lines

I don't think I understood this. you mean run line in `../llvm/test/CodeGen/AMDGPU/amdgpu-miscellaneous-uniform-intrinsic.ll`

PING: @arsenm 

https://github.com/llvm/llvm-project/pull/162819