fixed createTritonAMDGPULowerInstructionSchedHintsPass (#179)

Author: i-chaochen

xla/backends/gpu/codegen/triton/compilation_pipeline_rocm.cc

@@ -125,7 +125,7 @@ absl::Status CreateTritonPipeline(mlir::OpPassManager* pm,
   pm->addPass(mlir::createCSEPass());
   pm->addPass(mlir::createSymbolDCEPass());
   pm->addPass(mt::createTritonAMDGPULowerInstructionSchedHintsPass(
-      cc.gfx_version(), num_stages, "default"));
+      cc.gfx_version(), num_stages, "none"));
   pm->addPass(mt::createConvertBuiltinFuncToLLVMPass(/*ftz=*/true));
   // There is no clusters in ROCm for now.
   out_cluster_info.clusterDimX = 1;