qcacld-3.0: Use freq for SME roam API

Change below csr/sme APIs and dependent APIs to
use freq as parameter:
csr_create_roam_scan_channel_list,
csr_neighbor_roam_channels_filter_by_current_band,
csr_neighbor_roam_merge_channel_lists,
csr_create_bg_scan_roam_channel_list,
sme_update_roam_scan_channel_list.

Change-Id: Icfc45863d6dacb318558ba75fde111af24256641
CRs-Fixed: 2555688
7 files changed