media: annotate ->poll() instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/media/platform/via-camera.c

@@ -764,7 +764,7 @@ out_unlock:
 }
 
 
-static unsigned int viacam_poll(struct file *filp, struct poll_table_struct *pt)
+static __poll_t viacam_poll(struct file *filp, struct poll_table_struct *pt)
 {
 	struct via_camera *cam = video_drvdata(filp);