Send CTRL-EVENT-DISCONNECTED on wpa_supplicant AP deinit

This makes the AP mode more consistent with other modes by providing a
matching pair of CTRL-EVENT-CONNECTED and CTRL-EVENT-DISCONNECTED event
messages.

Signed-off-by: Jouni Malinen <j@w1.fi>
diff --git a/wpa_supplicant/ap.c b/wpa_supplicant/ap.c
index ea5b2b4..7ecf7a8 100644
--- a/wpa_supplicant/ap.c
+++ b/wpa_supplicant/ap.c
@@ -707,6 +707,9 @@
 	hostapd_interface_free(wpa_s->ap_iface);
 	wpa_s->ap_iface = NULL;
 	wpa_drv_deinit_ap(wpa_s);
+	wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
+		" reason=%d locally_generated=1",
+		MAC2STR(wpa_s->own_addr), WLAN_REASON_DEAUTH_LEAVING);
 }