drm/mediatek: Add new color format MACROs in OVL

Define new color formats to hide the bit operation in the MACROs to make
the switch statement more concise.
Change the MACROs to align the naming rule in DRM.

Reviewed-by: CK Hu <[e-mail]>
Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Signed-off-by: Hsiao Chien Sung <[e-mail]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[e-mail]/
Signed-off-by: Chun-Kuang Hu <[e-mail]>

drivers/gpu/drm/mediatek/mtk_disp_ovl.c

···
 #define OVL_CON_BYTE_SWAP	BIT(24)
 #define OVL_CON_MTX_YUV_TO_RGB	(6 << 16)
 #define OVL_CON_CLRFMT_RGB	(1 << 12)
-#define OVL_CON_CLRFMT_RGBA8888	(2 << 12)
-#define OVL_CON_CLRFMT_ARGB8888	(3 << 12)
+#define OVL_CON_CLRFMT_ARGB8888	(2 << 12)
+#define OVL_CON_CLRFMT_RGBA8888	(3 << 12)
+#define OVL_CON_CLRFMT_ABGR8888	(OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP)
+#define OVL_CON_CLRFMT_BGRA8888	(OVL_CON_CLRFMT_ARGB8888 | OVL_CON_BYTE_SWAP)
 #define OVL_CON_CLRFMT_UYVY	(4 << 12)
 #define OVL_CON_CLRFMT_YUYV	(5 << 12)
 #define OVL_CON_CLRFMT_RGB565(ovl)	((ovl)->data->fmt_rgb565_is_0 ? \
···
 		return OVL_CON_CLRFMT_RGB888(ovl) | OVL_CON_BYTE_SWAP;
 	case DRM_FORMAT_RGBX8888:
 	case DRM_FORMAT_RGBA8888:
-		return OVL_CON_CLRFMT_ARGB8888;
+		return OVL_CON_CLRFMT_RGBA8888;
 	case DRM_FORMAT_BGRX8888:
 	case DRM_FORMAT_BGRA8888:
 	case DRM_FORMAT_BGRA1010102:
-		return OVL_CON_CLRFMT_ARGB8888 | OVL_CON_BYTE_SWAP;
+		return OVL_CON_CLRFMT_BGRA8888;
 	case DRM_FORMAT_XRGB8888:
 	case DRM_FORMAT_ARGB8888:
 	case DRM_FORMAT_ARGB2101010:
-		return OVL_CON_CLRFMT_RGBA8888;
+		return OVL_CON_CLRFMT_ARGB8888;
 	case DRM_FORMAT_XBGR8888:
 	case DRM_FORMAT_ABGR8888:
-		return OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP;
+		return OVL_CON_CLRFMT_ABGR8888;
 	case DRM_FORMAT_UYVY:
 		return OVL_CON_CLRFMT_UYVY | OVL_CON_MTX_YUV_TO_RGB;
 	case DRM_FORMAT_YUYV: