COMPMID-556: Rename Error to Status and inverse logic

Change-Id: Ib57d4f7177cc6179302bda7ad870acb8bd3825f5
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/112115
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/arm_compute/runtime/CL/functions/CLNormalizationLayer.h b/arm_compute/runtime/CL/functions/CLNormalizationLayer.h
index 51cd28e..9392577 100644
--- a/arm_compute/runtime/CL/functions/CLNormalizationLayer.h
+++ b/arm_compute/runtime/CL/functions/CLNormalizationLayer.h
@@ -63,9 +63,9 @@
      * @param[in] output    Destination tensor. Dimensions, data type and number of channels must match the input ones.
      * @param[in] norm_info Normalization layer information like the normalization type, normalization size and other parameters.
      *
-     * @return an error status
+     * @return a status
      */
-    static Error validate(const ITensorInfo *input, const ITensorInfo *output, const NormalizationLayerInfo &norm_info);
+    static Status validate(const ITensorInfo *input, const ITensorInfo *output, const NormalizationLayerInfo &norm_info);
 
     // Inherited methods overridden:
     void run() override;