[clang] [llvm] [mlir] [AMDGPU] Rework the clamp support for WMMA instructions (PR #174310)

[via cfe-commits]

dyung wrote:

Hi @shiltian, in case you were not notified by the buildbot, I believe this change is causing 2 cross-project tests to fail on a bot (https://lab.llvm.org/buildbot/#/builders/174/builds/29695):
- cross-project-tests :: amdgpu/builtins-amdgcn-swmmac-w32.cl
- cross-project-tests :: amdgpu/builtins-amdgcn-swmmac-w64.cl

Can you take a look?

https://github.com/llvm/llvm-project/pull/174310