fix LSTM

mindspore/core/base/core_ops.h

@@ -193,7 +193,7 @@ inline const PrimitivePtr kPrimSoftmax = std::make_shared<Primitive>("Softmax");
 inline const PrimitivePtr kPrimSparseSoftmaxCrossEntropy = std::make_shared<Primitive>("SparseSoftmaxCrossEntropy");
 inline const PrimitivePtr kPrimLogSoftmax = std::make_shared<Primitive>("LogSoftmax");
 inline const PrimitivePtr kPrimLogSoftmaxGrad = std::make_shared<Primitive>("LogSoftmaxGrad");
-inline const PrimitivePtr kPrimLstm = std::make_shared<Primitive>("Lstm");
+inline const PrimitivePtr kPrimLstm = std::make_shared<Primitive>("LSTM");
 inline const PrimitivePtr kPrimTan = std::make_shared<Primitive>("Tan");
 inline const PrimitivePtr kPrimAtan2 = std::make_shared<Primitive>("Atan2");
 inline const PrimitivePtr kPrimAtan = std::make_shared<Primitive>("Atan");