qcacmn: Get CCA from firmware

Requirement is to get CCA from frmware when connection fails due to
assoc/auth/probe response timeout. These are common changes to get
CCA from firmware.

Change-Id: I062343ed065d7b0c38b9e3b24ecfa9851b9b1537
CRs-Fixed: 2031843

wmi_unified_priv.h

@@ -477,6 +477,9 @@ QDF_STATUS (*send_get_stats_cmd)(wmi_unified_t wmi_handle,
 		       struct pe_stats_req  *get_stats_param,
 			   uint8_t addr[IEEE80211_ADDR_LEN]);
 
+QDF_STATUS (*send_congestion_cmd)(wmi_unified_t wmi_handle,
+			A_UINT8 vdev_id);
+
 QDF_STATUS (*send_snr_request_cmd)(wmi_unified_t wmi_handle);
 
 QDF_STATUS (*send_snr_cmd)(wmi_unified_t wmi_handle, uint8_t vdev_id);