topologyd: Fix to read the bridge mac from list
In release7.2 the bridge mac in ieee1905 config has changed from the option to list. The host now lookup to this bridge mac to not add it own bridge address in the host table.
In release7.2 the bridge mac in ieee1905 config has changed from the option to list. The host now lookup to this bridge mac to not add it own bridge address in the host table.