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/tests/validation/reference/ColorConvert.cpp b/tests/validation/reference/ColorConvert.cpp
index 8047b34..9090319 100644
--- a/tests/validation/reference/ColorConvert.cpp
+++ b/tests/validation/reference/ColorConvert.cpp
@@ -46,6 +46,7 @@
 
     switch(format)
     {
+        case Format::U8:
         case Format::RGB888:
         case Format::RGBA8888:
         case Format::YUYV422:
@@ -102,6 +103,9 @@
                 case Format::RGBA8888:
                     colorconvert_helper::detail::colorconvert_rgb_to_rgbx(tensor_planes[0], dst[0]);
                     break;
+                case Format::U8:
+                    colorconvert_helper::detail::colorconvert_rgb_to_u8(tensor_planes[0], dst[0]);
+                    break;
                 case Format::NV12:
                     colorconvert_helper::detail::colorconvert_rgb_to_nv12(tensor_planes[0], dst);
                     break;