we need a fakeramdisk, like on sparc64

src/etc/etc.sparc/disktab

@@ -1,4 +1,4 @@
-# $OpenBSD: disktab,v 1.25 2011/06/08 19:16:19 krw Exp $
+# $OpenBSD: disktab,v 1.26 2012/09/10 18:49:42 deraadt Exp $
 
 miniroot:\
 	:ty=winchester:se#512:nt#2:rm#300:ns#64:nc#96:\
@@ -26,3 +26,7 @@ fakecdrom|Fake image for Bootable CDROM:\
 	:pc#1310720:oc#0:bc#8192:fc#1024:tc=4.2BSD:\
 	:pd#1310720:od#0:bd#8192:fd#1024:td=4.2BSD:
 
+fakeramdisk:\
+	:ty=winchester:se#512:nt#1:rm#350:ns#32:nc#384:\
+	:pa#12288:oa#0:ba#8192:fa#4096:ta=4.2BSD:\
+	:pc#12288:oc#0: