[llvm-branch-commits] [llvm] AMDGPU: Fix not folding splat immediate into VGPR MFMA src2 (PR #150628)

[Matt Arsenault via llvm-branch-commits]

arsenm wrote:

I suspect this regressed in 36018494fdb9e92e0f61f6937e5ecd3a4472677f and just didn't have tests, so perhaps this should go to the release branch 

https://github.com/llvm/llvm-project/pull/150628