drm/amd/display: Clean up pixel format types

[Why & How]
Equate the first non-subsampled video surface format to
the enum SURFACE_PIXEL_FORMAT_SUBSAMPLE_END since it's
not a real format.
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_hw_types.h

@@ -201,8 +201,9 @@ enum surface_pixel_format {
 	SURFACE_PIXEL_FORMAT_VIDEO_420_YCrCb,
 	SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCbCr,
 	SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCrCb,
+	SURFACE_PIXEL_FORMAT_SUBSAMPLE_END,
+	SURFACE_PIXEL_FORMAT_VIDEO_ACrYCb2101010 =
 		SURFACE_PIXEL_FORMAT_SUBSAMPLE_END,
-	SURFACE_PIXEL_FORMAT_VIDEO_ACrYCb2101010,
 	SURFACE_PIXEL_FORMAT_VIDEO_CrYCbA1010102,
 	SURFACE_PIXEL_FORMAT_VIDEO_AYCrCb8888,
 	SURFACE_PIXEL_FORMAT_INVALID