Update rocMLIR main ff6a92e68eb7c9c88ce473d77c368ee4b6d3d6ce (#4627)

Author: github-actions[bot]

requirements.txt

@@ -29,4 +29,4 @@ pybind/pybind11@3e9dfa2866941655c56877882565e7577de6fc7b --build
 msgpack/msgpack-c@cpp-3.3.0 -DMSGPACK_BUILD_TESTS=Off -DMSGPACK_BUILD_EXAMPLES=Off -DCMAKE_POLICY_VERSION_MINIMUM=3.5
 sqlite3@3.50.4 -DCMAKE_POSITION_INDEPENDENT_CODE=On
 ROCm/composable_kernel@ad0db05b040bacda751c65c705261b8a0a7ed25d --cmake subdir -DCMAKE_DIR=codegen -DCMAKE_POSITION_INDEPENDENT_CODE=On -DBUILD_TESTING=Off
-ROCm/rocMLIR@8b45d8aff9634f57488af0c1f89fdc5c2b2f6250 -DBUILD_FAT_LIBROCKCOMPILER=On -DLLVM_INCLUDE_TESTS=Off
+ROCm/rocMLIR@ff6a92e68eb7c9c88ce473d77c368ee4b6d3d6ce -DBUILD_FAT_LIBROCKCOMPILER=On -DLLVM_INCLUDE_TESTS=Off