V4L/DVB (5058): Pvrusb2: bug fix involving switch into radio mode

When the input is switched by opening /dev/radioX, we must also commit
that change into the driver core.
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/pvrusb2/pvrusb2-v4l2.c

@@ -921,6 +921,7 @@ static int pvr2_v4l2_open(struct inode *inode, struct file *file)
 			pvr2_ctrl_set_value(
 				pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT),
 				PVR2_CVAL_INPUT_RADIO);
+			pvr2_hdw_commit_ctl(hdw);
 		}
 
 		fhp->vnext = NULL;