[media] omap3isp: Fix warning caused by bad subdev events operations prototypes

Remove the const keyword from the V4L2 subdev events operations to match
the V4L2 API.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/platform/omap3isp/ispstat.c b/drivers/media/platform/omap3isp/ispstat.c
index d7ac76b..b8640be 100644
--- a/drivers/media/platform/omap3isp/ispstat.c
+++ b/drivers/media/platform/omap3isp/ispstat.c
@@ -1025,7 +1025,7 @@
 
 int omap3isp_stat_subscribe_event(struct v4l2_subdev *subdev,
 				  struct v4l2_fh *fh,
-				  const struct v4l2_event_subscription *sub)
+				  struct v4l2_event_subscription *sub)
 {
 	struct ispstat *stat = v4l2_get_subdevdata(subdev);
 
@@ -1037,7 +1037,7 @@
 
 int omap3isp_stat_unsubscribe_event(struct v4l2_subdev *subdev,
 				    struct v4l2_fh *fh,
-				    const struct v4l2_event_subscription *sub)
+				    struct v4l2_event_subscription *sub)
 {
 	return v4l2_event_unsubscribe(fh, sub);
 }