qcacld-3.0: Convert legacy chan ID usage to chan freq

Modify the following 3 APIs' code and parameters to make
sure they're using frequency instead of channel ID:
   sme_get_reg_info
   wlan_hdd_get_channel_info
   hdd_update_channel_bw_info

Change-Id: I87ad6fb9cd9fcd7fe4e41e62a32e4954e93f8ba1
CRs-Fixed: 2554710
5 files changed