arm64: dts: qcom: sdm630: Add I2C functions to I2C pins

This was overlooked earlier, fix it to ensure the busses can
work properly.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210728222542.54269-39-konrad.dybcio@somainline.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>