Merge pull request #5721 from tensor-tang/omp

fix typo

Author: luotao1

paddle/parameter/ParameterUpdateFunctions.cpp

@@ -30,7 +30,7 @@ void sgdUpdateCpu(real learningRate,
                   const real* grad,
                   real* momentumVec) {
   decayRate *= learningRate;
-#ifdef PADDLE_USE_MKLDNN
+#ifdef PADDLE_USE_MKLML
 #pragma omp parallel for
 #endif
   for (size_t i = 0; i < size; ++i) {