be2net: fix initialization of vlan_prio_bmap

Initialization of this field to "all priorities" must be done before MCC queue
creation. As soon as the MCC queue is created, an event modifying this value
may be received.

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>