COMPMID-2072: Use a constexpr for num_elems_processed_per_iteration where possible

Change-Id: I26cb699ae3a77003ef7d05ac30d3ed518214e25f
Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1375
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Manuel Bottini <manuel.bottini@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Marquez <pablo.tello@arm.com>
diff --git a/src/core/NEON/kernels/NELocallyConnectedMatrixMultiplyKernel.cpp b/src/core/NEON/kernels/NELocallyConnectedMatrixMultiplyKernel.cpp
index 46b7913..467546a 100644
--- a/src/core/NEON/kernels/NELocallyConnectedMatrixMultiplyKernel.cpp
+++ b/src/core/NEON/kernels/NELocallyConnectedMatrixMultiplyKernel.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -40,12 +40,9 @@
 #include <cstdint>
 #include <tuple>
 
-using namespace arm_compute;
-
 namespace arm_compute
 {
 class Coordinates;
-} // namespace arm_compute
 
 namespace
 {
@@ -317,7 +314,7 @@
 
 std::tuple<Status, Window> validate_and_configure_window(ITensorInfo *input0, ITensorInfo *input1, ITensorInfo *output)
 {
-    const unsigned int num_elems_processed_per_iteration_x = 16;
+    constexpr unsigned int num_elems_processed_per_iteration_x = 16;
 
     Window win = calculate_max_window(*output, Steps(num_elems_processed_per_iteration_x));
 
@@ -389,3 +386,4 @@
         }
     }
 }
+} // namespace arm_compute