efi_loader: EVT_NOTIFY_SIGNAL events

The notification function of events of type EVT_NOTIFY_SIGNAL should always
be queued when SignalEvent() is called.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 1ea96da..b6dfb39 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -239,7 +239,7 @@
 			if (evt->is_queued)
 				efi_queue_event(evt, check_tpl);
 		}
-	} else if (!event->is_signaled) {
+	} else {
 		event->is_signaled = true;
 		if (event->type & EVT_NOTIFY_SIGNAL)
 			efi_queue_event(event, check_tpl);