qcacmn: Add support for ACS diag event

Add APIs for ACS diag event:

- EVENT_WLAN_ACS_REQ
  ACS request event indication

- EVENT_WLAN_ACS_SCAN_START
  Indicates the diag event for ACS scan start request

- EVENT_WLAN_ACS_SCAN_DONE
  Indicates the diag event for ACS scan done

- EVENT_WLAN_ACS_BEST_CHANNEL
  Indicates the best channel has been selected after ACS

- EVENT_WLAN_ACS_CHANNEL_SPECTRAL_WEIGHTCHAN
  Indicates a diag event for ACS channel weight evaluation result

Change-Id: I508449c597caddba14a49aa9cf5da671b80e5bc4
CRs-Fixed: 2238687
4 files changed