[llvm] [AMDGPU] Fix broken MIR generated by gfx11 simulated trap lowering (PR #91652)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm approved this pull request.

The branching is cumbersome, but I guess it doesn't really matter since this should only appear at -O0 anyway 

https://github.com/llvm/llvm-project/pull/91652