qcacmn: Add obss detection offload support

Add support for obss detection offload support.
Sending WMI_SAP_OBSS_DETECTION_CFG_CMDID command
to firmware.

Change-Id: I56eba46e37330637c81d1a2cfa6542dd4ead8183
CRs-Fixed: 2170184

wmi/inc/wmi_unified_priv.h

@@ -1494,6 +1494,8 @@ QDF_STATUS (*extract_ndp_end_ind)(wmi_unified_t wmi_handle,
 #endif
 QDF_STATUS (*send_btm_config)(wmi_unified_t wmi_handle,
 			      struct wmi_btm_config *params);
+QDF_STATUS (*send_obss_detection_cfg_cmd)(wmi_unified_t wmi_handle,
+		struct wmi_obss_detection_cfg_param *obss_cfg_param);
 };
 
 /* Forward declartion for psoc*/