qcacld-3.0: Reject big data stats command in case of connected sta

Currently for station case if driver receives big data stats
command when station is connected it does not reject the command
and returns the big data stats. Since this command is not
supposed to come in connected case, for some of the stats,
driver returns incorrect values for some of the stats.

With this change reject the big data stats command for connected
station case as this command is for disconnected station.

Change-Id: I543b38f448eb3a8b2d97bd09c888957450116124
CRs-Fixed: 3043000

core/hdd/src/wlan_hdd_station_info.c

@@ -744,6 +744,11 @@ static int hdd_get_station_info(struct hdd_context *hdd_ctx,
 
 	hdd_sta_ctx = WLAN_HDD_GET_STATION_CTX_PTR(adapter);
 
+	if (hdd_cm_is_vdev_connected(adapter)) {
+		hdd_err("Station is connected, command is not supported");
+		return -EINVAL;
+	}
+
 	nl_buf_len = NLMSG_HDRLEN;
 	nl_buf_len += sizeof(hdd_sta_ctx->
 				cache_conn_info.last_ssid.SSID.length) +