arm64: dts: qcom: sc8180x: Add USB Type-C of_graph anchors

Define anchors for wiring up the USB Type-C graph in the board files.

Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230612221456.1887533-2-quic_bjorande@quicinc.com


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