With introduction of TDLS on 6 GHz, some of the channels
that peer can support will be same for 6 GHz band other
bands. So, extract frequency by using peer supported
operating class and supported channel list which can
be used for further processing.
If channel numbers are used then the duplicate channel
numbers are removed which may lead to skipping 6 GHz
supported channels.
Change-Id: Ic6838d05c3dab5a0cc17483890b83805e076684c
CRs-Fixed: 3233999