Add a common physdev UID to all ports in the Qualcomm SoC, so that they
are all bound together to the same modem object.
This change assumes that no external plugged device ever exports a
QRTR node in the QRTR bus (e.g. that no PCI or USB device would ever
do that). This assumption is likely wrong, but given that we're
currently limiting the QRTR support to the Qualcomm SoC plugin, the
assumption is valid for us for now.
Aleksander Morgado
591d904f5c