SYSLINK: notify - ducatidrv frees event listener

In the function notify_ducatidrv_unregister_event, it finds the event listener
and deletes the list element containing that listener, but did not free the
listener object itself, which was kmalloced in notify_ducatidrv_register_event.
The listener is now being freed.
Signed-off-by: Simon Que <sque@ti.com>

drivers/dsp/syslink/notify_ducatidriver/notify_ducati.c

@@ -874,6 +874,7 @@ int notify_ducatidrv_unregister_event(
 		goto func_end;
 	}
 	list_del((struct list_head *)&(listener->element));
+	kfree(listener);
 	event_list[event_no].event_handler_count--;