arm64: dts: actions: s700-cubieboard7: Enable I2C0 and I2C1

Add pinctrl definitions for Actions Semiconductor S700 I2C controllers.
Pinctrl definitions are only available for I2C0, I2C1 and I2C2.
Enable I2C0 (PMIC), I2C1 (gyro, touchscreen) in cubieboard7.

Signed-off-by: Parthiban Nallathambi <pn@denx.de>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>