fix

Author: co63oc

backends/gcu/common/gcu_op_runner.h

@@ -33,7 +33,7 @@ using DataType = phi::DataType;
 using Place = phi::Place;
 using CPUPlace = phi::CPUPlace;
 using CPUContext = phi::CPUContext;
-using DataTypeToString = phi::DataTypeToString;
+using phi::DataTypeToString;
 using TensorNameMap = std::map<std::string, std::vector<std::string>>;
 using TensorValueMap = std::map<std::string, std::vector<DenseTensor*>>;
 using TensorNameValuePair = std::pair<std::string, DenseTensor*>;