arm64: dts: actions: s900: Add I2C controller nodes

Add I2C controller nodes for Actions Semiconductor S900 SoC.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[AF: Squashed/added clocks, dropped pinctrl properties for now]
Signed-off-by: Andreas Färber <afaerber@suse.de>