drm/bridge: analogix_dp: possible condition with no effect (if == else)

fix below warning reported by coccicheck

./drivers/gpu/drm/bridge/analogix/analogix_dp_core.c:1414:6-8: WARNING:
possible condition with no effect (if == else)

Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190525175937.GA29368@hari-Inspiron-1545

drivers/gpu/drm/bridge/analogix/analogix_dp_core.c

@@ -1411,8 +1411,6 @@ static void analogix_dp_bridge_mode_set(struct drm_bridge *bridge,
 		video->color_space = COLOR_YCBCR444;
 	else if (display_info->color_formats & DRM_COLOR_FORMAT_YCRCB422)
 		video->color_space = COLOR_YCBCR422;
-	else if (display_info->color_formats & DRM_COLOR_FORMAT_RGB444)
-		video->color_space = COLOR_RGB;
 	else
 		video->color_space = COLOR_RGB;