arm64: dts: qcom: c630: add debug uart

The c630 exposes its debug UART via a connector on the PCB, enable it.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
Link: https://lore.kernel.org/r/20230627-c630-uart-and-1p2-reg-v2-2-496b581935c1@linaro.org


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