mediatek: mt8195: add rtc power off sequence

mt8195 also uses mt6359p RTC. Revice mt8192 RTC and share the
driver with mt8195.

Change-Id: I20c73f6e0af67ef9d4c3d4e0ff373f93950e07db
Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
7 files changed