arm64: dts: mediatek: mt8183: Add domain supply for mfg

Add domain supply node.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Link: https://lore.kernel.org/r/20210129101208.2625249-4-hsinyi@chromium.org


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