arm64: dts: qcom: sc8180x-pmics: Add second PMC8180 GPIO

arm64: dts: qcom: sc8180x-pmics: Add second PMC8180 GPIO

The SC8180X comes with two PMC8180 PMICs, with the GPIO block being used
to control VBUS supply of the second USB multiport port.

Rename the GPIO controller in the first PMC8180 to match the schematics
and define this second controller.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Link: https://lore.kernel.org/r/20240730-sc8180x-usb-mp-v2-3-a7dc4265b553@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>