!6886 [MS][LITE][GPU]optimize GPU benchmark performance

Merge pull request !6886 from chenzupeng/master-lite

mindspore/lite/src/executor.cc

@@ -28,7 +28,7 @@ int Executor::Run(std::vector<Tensor *> &in_tensors, std::vector<Tensor *> &out_
       MS_LOG(ERROR) << "Graph input tensor is nullptr";
       return RET_ERROR;
     }
-    if (inTensor->MutableData() == nullptr) {
+    if (inTensor->data_c() == nullptr) {
       MS_LOG(ERROR) << "Graph input tensor data is nullptr";
       return RET_ERROR;
     }