qcacld-3.0: Allow single SAP started on DFS chan

With new configuration g_sta_sap_scc_on_dfs_chan = 2:
1. SAP is allowed to start on dfs channel if no STA interface
active on the same mac.
2. SAP is allowed SCC with STA on DFS chan without DFS master
functionality and ignore Radar event
3. Skip cac if dfs master capability disabled based on
the configuration and current connection combination.

Change-Id: If2ffb253e51c94c06a105b2691c19f7d246fcc98
CRs-Fixed: 2468004
4 files changed