feat(mt8196): add vcore dvfs drivers

- VCORE DVFS is the feature to change VCORE/DDR Freq for power saving
- When there are no requests for using Vcore/DRAM, Vcore DVFS will
- lower the voltage and

feat(mt8196): add vcore dvfs drivers

- VCORE DVFS is the feature to change VCORE/DDR Freq for power saving
- When there are no requests for using Vcore/DRAM, Vcore DVFS will
- lower the voltage and frequency of Vcore/DRAM to achieve power saving.

Signed-off-by: Kunlong Wang <kunlong.wang@mediatek.com>
Change-Id: I1126311e8b3943cc54fb13e15973b9e1b74c129e

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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-o

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

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feat(mt8188): add MT8188 SPM support

Add SPM basic functions including SPM init.

Signed-off-by: James Liao <jamesjj.liao@mediatek.com>
Change-Id: I5d4860685c15f3b8d555e697837862287f0c303e