Use "mkdir -p" instead of "mkdir" to create /dev/altq

etc/etc.i386/MAKEDEV

@@ -1,6 +1,6 @@
 #!/bin/sh -
 #
-#	$NetBSD: MAKEDEV,v 1.166 2002/02/05 09:14:12 lukem Exp $
+#	$NetBSD: MAKEDEV,v 1.167 2002/02/11 12:27:10 martti Exp $
 #
 # Copyright (c) 1990 The Regents of the University of California.
 # All rights reserved.
@@ -856,7 +856,7 @@ dpti*)
 	;;
 
 altq)
-	mkdir altq
+	mkdir -p altq
 	chmod 755 altq
 	unit=0
 	for dev in altq cbq wfq afm fifoq red rio localq hfsc \