dt-bindings: i2c: Add Mediatek MT8183 i2c binding

Add MT8183 i2c binding to binding file. Compare to MT2712 i2c
controller, MT8183 has different registers, offsets, and clock.

Signed-off-by: Qii Wang <qii.wang@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>