media: i2c: imx219: Drop check for reentrant .s_stream()

The subdev .s_stream() operation shall not be called to start streaming
on an already started subdev, or stop streaming on a stopped subdev.
Remove the check that guards against that condition.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/imx219.c

@@ -980,9 +980,6 @@ static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
 
 	state = v4l2_subdev_lock_and_get_active_state(sd);
 
-	if (imx219->streaming == enable)
-		goto unlock;
-
 	if (enable) {
 		/*
 		 * Apply default & customized values