qcacmn: Fix SAP start failed after dual sta enabled
With MLO enabled, MLO STA wlan0 will consumed 3 MAC address, consider 2nd
STA wlan1, p2p and NAN interface, consumed 6 MAC addresses totally, SAP
failed to start for no MAC address.
To fix it, increase MAC address num to 7 when MLO supported.
Keep max vdev num as 6, no side effect on firmware.
Change-Id: Idbc3b7159ec3ceb42fa8a13718cd7402d6eb8090
CRs-Fixed: 3298515