reset: hi6220: Reset driver for hisilicon hi6220 SoC

Add reset driver for hi6220-hikey board,this driver supply deassert
of IP on hi6220 SoC.

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
5 files changed