The function isn't called from outside of its compilation unit, make it
static.
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Acked-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>