When the VFIO bound VF is tagged with a VLAN, we create an extra VLAN IF on top of the dummy with the same tag.
The VF's PCI ID is added to the dummy (VLAN too) as an Alias.
This mapping should be enough for applications to map allocations to the proper device.

I have absolutely no idea when, but SR-IOV Device Management broke at some point due to not setting DeviceID into DanmEp.
This is now fixed, SR-IOV works again as intended.
In addition to that MAC address is also saved into DanmEp for VFs, and used to make dummy interfaces.

The dummy NICs will be provisioned with the MAC of the VF, even if they are bound to a user space driver.
Also expanded user documentation with the additional feature.