COMPMID-287: NEON colour convert to U8

Change-Id: I47033fa70881fd32b13266adb6ccbf10c202aabc
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/150344
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
diff --git a/arm_compute/runtime/NEON/functions/NEColorConvert.h b/arm_compute/runtime/NEON/functions/NEColorConvert.h
index ab0bf14..73eb3f9 100644
--- a/arm_compute/runtime/NEON/functions/NEColorConvert.h
+++ b/arm_compute/runtime/NEON/functions/NEColorConvert.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017 ARM Limited.
+ * Copyright (c) 2016-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -40,7 +40,8 @@
      *
      * @param[in]  input  Source tensor. Formats supported: RGBA8888/UYVY422/YUYV422/RGB888
      * @param[out] output Destination tensor. Formats supported: RGB888 (if the formats of @p input are RGBA8888/UYVY422/YUYV422),
-     *                                                          RGBA8888 (if the formats of @p input are UYVY422/YUYV422/RGB888/)
+     *                                                          RGBA8888 (if the formats of @p input are UYVY422/YUYV422/RGB888/),
+     *                                                          U8 (if the formats of @p input is RGB888)
      */
     void configure(const ITensor *input, ITensor *output);
     /** Initialize the function's source, destination