arm64: dts: qcom: sm8550-mtp: add pmic glink node

Add the pmic glink node linked with the DWC3 USB controller
switched to OTG mode and tagged with usb-role-switch.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230130-topic-sm8450-upstream-pmic-glink-v5-11-552f3b721f9e@linaro.org