qcacmn: Add WMI API for setting bandwidth fairness

This change implements the Non-TLV WMI API for setting bandwidth
fairness. This WMI command was implemented as part of the recent WIN SW
release. This change ensures it is adapted to convergence code structure.

Change-Id: Ib9984c43b91b105bfb4687a7591f4fab509febc4
CRs-Fixed: 1060577

wmi/inc/wmi_unified_priv.h

@@ -708,6 +708,9 @@ QDF_STATUS (*send_get_buf_extscan_hotlist_cmd)(wmi_unified_t wmi_handle,
 QDF_STATUS (*send_pdev_get_tpc_config_cmd)(wmi_unified_t wmi_handle,
 		uint32_t param);
 
+QDF_STATUS (*send_set_bwf_cmd)(wmi_unified_t wmi_handle,
+		struct set_bwf_params *param);
+
 QDF_STATUS (*send_set_atf_cmd)(wmi_unified_t wmi_handle,
 		struct set_atf_params *param);