V4L/DVB: v4l2-subdev.h: fix enum_mbus_fmt prototype

enum_mbus_fmt received an index argument that was defined as an int instead
of an unsigned int. This is now fixed. This had the knock-on effect that the
index argument in the callback get_formats in soc_camera.h also had to be
changed to unsigned int.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/ov772x.c b/drivers/media/video/ov772x.c
index 7f8ece3..86b0186 100644
--- a/drivers/media/video/ov772x.c
+++ b/drivers/media/video/ov772x.c
@@ -1092,10 +1092,10 @@
 #endif
 };
 
-static int ov772x_enum_fmt(struct v4l2_subdev *sd, int index,
+static int ov772x_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 			   enum v4l2_mbus_pixelcode *code)
 {
-	if ((unsigned int)index >= ARRAY_SIZE(ov772x_cfmts))
+	if (index >= ARRAY_SIZE(ov772x_cfmts))
 		return -EINVAL;
 
 	*code = ov772x_cfmts[index].code;