qcacld-3.0: Fix get sap connected sta info fcs counter always 0

Stats event from target might have several sub events, and some event
has no peer stats but have adv/ext2 peer stats.

Check ext/ext2 peer stats even no peer stats in
target_if_cp_stats_extract_peer_stats(). Fix copy adv stats size error
in tgt_mc_cp_stats_prepare_n_send_raw_station_stats(). Although
get_station_stats_cb and get_peer_stats_cb is union callbacks,
better to assign to get_station_stats_cb because it is for
TYPE_STATION_STATS.

Change-Id: I0bead0cbb8b549cc538ef4a7327f0a8303c90bd1
CRs-Fixed: 2801842

components/cp_stats/dispatcher/src/wlan_cp_stats_mc_tgt_api.c

@@ -1017,7 +1017,7 @@ tgt_mc_cp_stats_prepare_n_send_raw_station_stats(struct wlan_objmgr_psoc *psoc,
 		info.num_peer_adv_stats = 1;
 		qdf_mem_copy(info.peer_adv_stats,
 			     peer_mc_stats->adv_stats,
-			     sizeof(peer_mc_stats->adv_stats));
+			     sizeof(*peer_mc_stats->adv_stats));
 	}
 
 	wlan_cp_stats_peer_obj_unlock(peer_cp_stats_priv);