trivial: fu-udev-device: use parent udev device to indicate `internal`
trivial: fu-udev-device: use parent udev device to indicate `internal`

If the parent device is hooked up via I2C that's a pretty good
indication that the touchpad is internal to the device.

fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd