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/mt9m111.c b/drivers/media/video/mt9m111.c
index d35f536..bac0c5d 100644
--- a/drivers/media/video/mt9m111.c
+++ b/drivers/media/video/mt9m111.c
@@ -999,10 +999,10 @@
 #endif
 };
 
-static int mt9m111_enum_fmt(struct v4l2_subdev *sd, int index,
+static int mt9m111_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 			    enum v4l2_mbus_pixelcode *code)
 {
-	if ((unsigned int)index >= ARRAY_SIZE(mt9m111_colour_fmts))
+	if (index >= ARRAY_SIZE(mt9m111_colour_fmts))
 		return -EINVAL;
 
 	*code = mt9m111_colour_fmts[index].code;