event: Export event_type_name()

Export this function so it can be used with initcall debugging.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/event.h

@@ -230,6 +230,14 @@ void event_show_spy_list(void);
  */
 int event_manual_reloc(void);
 
+/**
+ * event_type_name() - Get the name of an event type
+ *
+ * @type: Type to check
+ * Return: Name of event, or "(unknown)" if not known
+ */
+const char *event_type_name(enum event_t type);
+
 /**
  * event_notify() - notify spies about an event
  *