vlan_interface: Remove interface name usage
vlan_interface: Remove interface name usage

This makes it possible to remove from the dbus interface completely.

Change-Id: I7e572306e75b8494a72a9a2b8bf2ceece6ab168c
Signed-off-by: William A. Kennington III <30fff5198f4d10ca1117e5f3ec82f3b4b8900d81@google.com>

openbmc/phosphor-networkd,openbmc/phosphor-networkd