There is a possibility that driver already has a vdev
with the mac address same as bssid, in this case sta
should not connect to this AP as it may lead to undefined
behavior.
To address above issue add a check to compare bssid with
already existing vdevs before connect start.
Along with above changes add few renaming changes also.
Change-Id: Ia12be0b392a01bf935b5261e505290064de68805
CRs-Fixed: 2809147
3faf318e8c