arm64: mt8173.dtsi: correct i2c node names

Node name in device tree should describe general class of the
device. Correct incorrect i2c node names.

Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>