[mlir][ROCDL] Add fp4 and fp6 conversion intrinsics, fix fp8 immargs#140801

krzysz00 merged 1 commit intomainllvm/llvm-project:mainfrom

users/krzysz00/mxfp-conversion-intrinsicsllvm/llvm-project:users/krzysz00/mxfp-conversion-intrinsicsCopy head branch name to clipboard