fix element mul and add mecro

src/operators/op_param.cpp

@@ -44,12 +44,17 @@ template class ConvParam<FPGA>;
 template class ConvParam<GPU_MALI>;
 #endif
 
+#ifdef ELEMENTWISEADD_OP
 template class ElementwiseAddParam<CPU>;
 template class ElementwiseAddParam<FPGA>;
 template class ElementwiseAddParam<GPU_MALI>;
+#endif
+
+#ifdef ELEMENTWISEMUL_OP
 template class ElementwiseMulParam<CPU>;
 template class ElementwiseMulParam<FPGA>;
 template class ElementwiseMulParam<GPU_MALI>;
+#endif
 
 #ifdef MUL_OP
 template class MulParam<CPU>;