[llvm] [AMDGPU] Fix LowerDIVREM24 for the unsigned case (PR #196418)

[Manuel Carrasco via llvm-commits]

mgcarrasco wrote:

> Can we get an execution test for this somewhere?

@arsenm Yes, sure. I can try to do it here https://github.com/llvm/llvm-test-suite/tree/main/External/HIP. Let me know if there is a better place.

https://github.com/llvm/llvm-project/pull/196418