WPS: Mark functions static

These functions are used only within wps_upnp_event.c.

src/wps/wps_upnp_event.c

@@ -89,7 +89,7 @@ static void event_clean(struct wps_event_ *e)
 /* event_delete -- delete single unqueued event
  * (be sure to dequeue first if need be)
  */
-void event_delete(struct wps_event_ *e)
+static void event_delete(struct wps_event_ *e)
 {
 	event_clean(e);
 	wpabuf_free(e->data);
@@ -432,7 +432,7 @@ static int event_send_start(struct subscription *s)
 
 
 /* event_send_all_later_handler -- actually send events as needed */
-void event_send_all_later_handler(void *eloop_data, void *user_ctx)
+static void event_send_all_later_handler(void *eloop_data, void *user_ctx)
 {
 	struct upnp_wps_device_sm *sm = user_ctx;
 	struct subscription *s;

src/wps/wps_upnp_i.h

@@ -191,7 +191,6 @@ void web_listener_stop(struct upnp_wps_device_sm *sm);
 
 /* wps_upnp_event.c */
 int event_add(struct subscription *s, const struct wpabuf *data);
-void event_delete(struct wps_event_ *e);
 void event_delete_all(struct subscription *s);
 void event_send_all_later(struct upnp_wps_device_sm *sm);
 void event_send_stop_all(struct upnp_wps_device_sm *sm);