To do this without rebooting the device implement VliUsbhubPdDevice->reload() like the other FuVliUsbhubDevice child devices. Fixes half of https://github.com/fwupd/fwupd/issues/2376
This is used by non-usbhub devices too, albeit at offset 0x0.
vli_usbhub
vli
In the future we'll be doing PD updates without any USB hub at all.