The Raspberry Pi 4 uses XHCI for all host USB ports, however the DWC OTG [[ https://raspberrypi.stackexchange.com/questions/100583/where-is-the-usb2-otg-port-on-the-rpi-4-model-b-located | is still present and is now responsible for the Type-C port, always in device mode ]].
This adds support for it in ACPI mode. The code is based on `dwc_otg_fdt`, simplified (only one interrupt, always device mode).
ACPI table: https://github.com/tianocore/edk2-platforms/blob/2d07a49e45326a56354167061390deba526b3c70/Platform/RaspberryPi/AcpiTables/GpuDevs.asl#L13-L33