soc: mediatek: mmsys: add mmsys reset control for MT8186

Add mmsys reset control register 0x160 for MT8186.

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220217082626.15728-3-rex-bc.chen@mediatek.com


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>