LFR2 uses ft reassoc, whose process is different from general
connect.
1.ft reassoc, normal reassoc and assoc, all of 3 need deliver
event WLAN_VDEV_SM_EV_START to SM, but need different handler.
2.ft reassoc send vdev start when add bss, not switch channel.
Change-Id: Ieefbcf0a28867be3c8a86d9a912143857c54fe06
CRs-Fixed: 2334194