Fix intraBSS MCAST traffic issue between legacy and MLO
clients. Fix includes below changes
1. Change get_mcast_primary_vdev to return correct value
in case current VDEV is mcast primary
2. Avoid checking vdev->mlo_dev as it is set only for
mcast primary VDEV
3. In intraBSS ucast case use destination SOC to get the
destination peer with da_peer_id
Change-Id: I0d7a890bc62f703cd92e7c9edc20768a9a487d06
CRs-Fixed: 3456458
fdc228f338