Currently in the scan path frequencies received
in the scan request are getting converted to channel
number and again converted to frequncies.
For 6GHz support in the scan path do not convert
frequency to channel number, instead use frequncies
received in scan request to send the scan command to
FW, remove the dummy conversion from chan to freq and
freq to chan.
Change-Id: Ieab7dded0678fac54796bba3b1b210c910f6173e
CRs-fixed: 2534897