Extend the V4L2Subdevice class to support getting and setting routing tables. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Tested-by: Jacopo Mondi <jacopo@jmondi.org>