feat(mt8196): add SPM features support

When the system is in idle or suspend state, SPM will turn off some
unused system resources. This patch enables this feature to achieve
power saving.

Signed-off-by: Wenzhen Yu <wenzhen.yu@mediatek.com>
Change-Id: Ia9764b91073c4765d41fe7fcd8e4a21372c290f1
18 files changed