Remove the STA entry on reassociation to clear STA PS state

hostapd needs to remove the old STA entry if it exists when processing
reassociation back to the same AP. This removes the potentially PS
buffered frames and allows association parameters to be updated with
mac80211.

hostapd/ieee802_11.c

@@ -1679,6 +1679,13 @@ static void handle_assoc_cb(struct hostapd_data *hapd,
 	sta->sa_query_timed_out = 0;
 #endif /* CONFIG_IEEE80211W */
 
+	/*
+	 * Remove the STA entry in order to make sure the STA PS state gets
+	 * cleared and configuration gets updated in case of reassociation back
+	 * to the same AP.
+	 */
+	hostapd_sta_remove(hapd, sta->addr);
+
 	if (hostapd_sta_add(hapd->conf->iface, hapd, sta->addr, sta->aid,
 			    sta->capability, sta->supported_rates,
 			    sta->supported_rates_len, 0, sta->listen_interval,