COMPMID-494: Fixing values to const

Change-Id: I21a4191b032df17611e01d20d89cc21e8eaf68fc
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/109605
Tested-by: BSG Visual Compute Jenkins server to access repositories on http://mpd-gerrit.cambridge.arm.com <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/tests/validation/CL/BatchNormalizationLayer.cpp b/tests/validation/CL/BatchNormalizationLayer.cpp
index c29a400..6884131 100644
--- a/tests/validation/CL/BatchNormalizationLayer.cpp
+++ b/tests/validation/CL/BatchNormalizationLayer.cpp
@@ -59,7 +59,7 @@
                shape0, shape1, epsilon, dt)
 {
     // Set fixed point position data type allowed
-    int fixed_point_position = (arm_compute::is_data_type_fixed_point(dt)) ? 3 : 0;
+    const int fixed_point_position = (arm_compute::is_data_type_fixed_point(dt)) ? 3 : 0;
 
     // Create tensors
     CLTensor src   = create_tensor<CLTensor>(shape0, dt, 1, fixed_point_position);