Add support for the resets on Cix's Sky1 SoC.
There are two reset controllers on Cix Sky1 Soc. One is located in S0
domain, and the other is located in S5 domain.

Signed-off-by: Gary Yang <gary.yang@cixtech.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>