qcacld-3.0: Replace channel number by channel frequency

To support 6Ghz channel, update channel number of struct
sap_StartBssCompleteEvent_s, hdd_ap_ctx and sap_ch_selected_s.

Change-Id: I19e6d7d03072135abed25e077e8573b5326ddba8
CRs-Fixed: 2519308
11 files changed