sna/video/overlay: Declare support for depth 8 and 30

Add 8 and 30 to the list of supported screen depths. The colorkey
massaging will be handled by the kernel so we don't have to worry
about it unlike with the sprite colorkey uapi.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

src/sna/sna_video_overlay.c

@@ -57,9 +57,11 @@ static Atom xvGamma0, xvGamma1, xvGamma2, xvGamma3, xvGamma4, xvGamma5;
 #define IMAGE_MAX_HEIGHT_LEGACY	1088
 
 static XvFormatRec Formats[] = {
+	{ .depth = 8, },
 	{ .depth = 15, },
 	{ .depth = 16, },
 	{ .depth = 24, },
+	{ .depth = 30, },
 };
 
 static const XvAttributeRec Attributes[] = {