qcacmn: Add target_if/wmi implementation of get congestion stats

Add changes to support get congestion stats(arp stats) from
within cp_stats component.

Change-Id: Ic3b2f020c0169c9113c1b40738f782cbb3b8f6c5
CRs-Fixed: 2222781

wmi/inc/wmi_unified_priv.h

@@ -1616,6 +1616,11 @@ QDF_STATUS (*extract_twt_resume_dialog_comp_event)(wmi_unified_t wmi_handle,
 		uint8_t *evt_buf,
 		struct wmi_twt_resume_dialog_complete_event_param *params);
 #endif
+
+#ifdef QCA_SUPPORT_CP_STATS
+QDF_STATUS (*extract_cca_stats)(wmi_unified_t wmi_handle, void *evt_buf,
+				struct wmi_host_congestion_stats *stats);
+#endif /* QCA_SUPPORT_CP_STATS */
 };
 
 /* Forward declartion for psoc*/