feat(mt8188): add backup/restore function when power on/off

Add APU backup/restore function when power on/off.

Change-Id: Id0451bd12f402e1acabeb5c12266a2e01836e9dd
Signed-off-by: Chungying Lu <chungying.lu@mediatek.com>
Signed-off-by: Karl Li <karl.li@mediatek.com>
3 files changed