COMPMID-617: Add validation functions.

Added validation routines to the following kernels.
-CLActivationLayer
-CLBatchNormalizationLayer
-CLArithmeticAddition
-CLArithmeticSubtraction
-CLPixelwiseMultiplication

Change-Id: I0f3a03154f9e392279f715af656683cd0ad4cef5
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/94595
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/src/runtime/CL/functions/CLBatchNormalizationLayer.cpp b/src/runtime/CL/functions/CLBatchNormalizationLayer.cpp
index 68cdaac..c4e307e 100644
--- a/src/runtime/CL/functions/CLBatchNormalizationLayer.cpp
+++ b/src/runtime/CL/functions/CLBatchNormalizationLayer.cpp
@@ -42,6 +42,14 @@
     _norm_kernel.configure(input, output, mean, var, beta, gamma, epsilon);
 }
 
+Error CLBatchNormalizationLayer::validate(const ITensorInfo *input, const ITensorInfo *output,
+                                          const ITensorInfo *mean, const ITensorInfo *var,
+                                          const ITensorInfo *beta, const ITensorInfo *gamma,
+                                          float epsilon)
+{
+    return CLBatchNormalizationLayerKernel::validate(input, output, mean, var, beta, gamma, epsilon);
+}
+
 void CLBatchNormalizationLayer::run()
 {
     CLScheduler::get().enqueue(_norm_kernel, true);