dt-bindings: power: Add MT8195 power domains

Add power domains dt-bindings for MT8195.

Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220130012104.5292-2-chun-jie.chen@mediatek.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>