ARM: mmp: add PM support for mmp2

MMP2 can enter system sleep level during suspend.
It can be waken up by PMIC interrupt, RTC/ALARM.

Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
4 files changed