Currently the driver does not verify the channel of the
AP and adds that to the connect list.
If a connect comes to the driver for this BSSID, then the
driver sends the same channel to the FW to start the vdev
which results in an assert due to channel not valid.
Fix is to check the validity of the channel and send a
vdev start only with a valid channel frequency.
Change-Id: Ic5c8c446f8731b32123051126503b071428f122c
CRs-Fixed: 2515158
12eacc2c93