drm/i915: Sort format arrays consistently

Let's try to keep the pixel format arrays somewhat sorted:
1. RGB before YUV
2. smaller bpp before larger bpp
3. X before A
4. RGB before BGR

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191031165652.10868-7-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/display/intel_display.c

@@ -85,8 +85,8 @@
 /* Primary plane formats for gen <= 3 */
 static const u32 i8xx_primary_formats[] = {
 	DRM_FORMAT_C8,
-	DRM_FORMAT_RGB565,
 	DRM_FORMAT_XRGB1555,
+	DRM_FORMAT_RGB565,
 	DRM_FORMAT_XRGB8888,
 };
 

drivers/gpu/drm/i915/display/intel_sprite.c

@@ -2389,10 +2389,10 @@ static const u32 snb_plane_formats[] = {
 static const u32 vlv_plane_formats[] = {
 	DRM_FORMAT_C8,
 	DRM_FORMAT_RGB565,
-	DRM_FORMAT_ABGR8888,
-	DRM_FORMAT_ARGB8888,
-	DRM_FORMAT_XBGR8888,
 	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
 	DRM_FORMAT_XBGR2101010,
 	DRM_FORMAT_ABGR2101010,
 	DRM_FORMAT_YUYV,