Use the vb2 ioctl handler directly.
Signed-off-by: NLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: NJacopo Mondi <jacopo@jmondi.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>