dts: mt8173-evb: Add da9211 to i2c1

Add a DA9211 dual-channel BUCK regulator to i2c1.
This regulator supplies GPU and DVFS1 voltages.

Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>