V4L/DVB: uvcvideo: Power line frequency control doesn't support GET_MIN/MAX/RES

Issuing a GET_MIN request on the power line frequency control times out
on at least the Apple iSight. As the UVC specification doesn't list
GET_MIN/MAX/RES as supported on that control, remove them from the
uvc_ctrls array.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/uvc/uvc_ctrl.c

@@ -122,8 +122,8 @@ static struct uvc_control_info uvc_ctrls[] = {
 		.selector	= UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
 		.index		= 10,
 		.size		= 1,
-		.flags		= UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE
-				| UVC_CONTROL_RESTORE,
+		.flags		= UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR
+				| UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE,
 	},
 	{
 		.entity		= UVC_GUID_UVC_PROCESSING,