Added a check in RX path to detect multicast loopback packets in
qwrap mode. In qwrap mode, there are multiple station vaps and
multicast loopback packet from one station vap should not come into
the other station vap. Added a check for this by iterating through
the vap list and checking if any of the vdev mac address matches
with the source address of the packet.
Also added a new vdev parameter to check if qwrap isolation mode is
enabled. In qwrap isolation mode, loopback packets should not be
dropped.
Change-Id: I7d35bf657a87337871156e4caec9038432e23a87
CRs-fixed: 2149190
47e7416b12