This adds a DT only driver for the GPIO controller found on Marvell
Orion/MVEBU SoCs (Armada 370/XP, Dove, Kirkwood, MV78x00, Orion5x).
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>