Now the core implements the work queue, remove it from the drivers,
and switch to using brightness_set_blocking op.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NJacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: NAntonio Ospite <ao2@ao2.it>
Reviewed-by: NMark Brown <broonie@kernel.org>