Add hi6220 media subsystem reset controller.
Signed-off-by: NChen Feng <puck.chen@hisilicon.com>
Signed-off-by: NXia Qing <saberlily.xia@hisilicon.com>
Signed-off-by: NXinliang Liu <xinliang.liu@linaro.org>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>