openprom, just like eeprom; ok miod

src/etc/etc.macppc/MAKEDEV.md

@@ -1,6 +1,6 @@
 define(MACHINE,macppc)dnl
 vers(__file__,
-	{-$OpenBSD: MAKEDEV.md,v 1.63 2014/12/11 19:48:03 tedu Exp $-},
+	{-$OpenBSD: MAKEDEV.md,v 1.64 2015/03/11 18:43:11 deraadt Exp $-},
 etc.MACHINE)dnl
 dnl
 dnl Copyright (c) 2001-2006 Todd T. Fries <todd@OpenBSD.org>
@@ -100,7 +100,7 @@ divert(__mddivert)dnl
 dnl
 _std(1, 2, 43, 6)
 	M xf86		c 2 4 600
-	M openprom	c 82 0 640 kmem
+	M openprom	c 82 0 600
 	;;
 
 dnl

src/etc/etc.sparc/MAKEDEV.md

@@ -1,6 +1,6 @@
 define(MACHINE,sparc)dnl
 vers(__file__,
-	{-$OpenBSD: MAKEDEV.md,v 1.54 2015/03/11 18:13:47 deraadt Exp $-},
+	{-$OpenBSD: MAKEDEV.md,v 1.55 2015/03/11 18:43:11 deraadt Exp $-},
 etc.MACHINE)dnl
 dnl
 dnl Copyright (c) 2001-2006 Todd T. Fries <todd@OpenBSD.org>
@@ -116,7 +116,7 @@ ramdisk)
 
 _std(2, 3, 122, 16)
 	M eeprom	c 3 11	600
-	M openprom	c 70 0	640 kmem
+	M openprom	c 70 0	600
 	;;
 dnl
 dnl *** some sparc-specific targets

src/etc/etc.sparc64/MAKEDEV.md

@@ -1,6 +1,6 @@
 define(MACHINE,sparc64)dnl
 vers(__file__,
-	{-$OpenBSD: MAKEDEV.md,v 1.80 2014/12/11 19:48:03 tedu Exp $-},
+	{-$OpenBSD: MAKEDEV.md,v 1.81 2015/03/11 18:43:11 deraadt Exp $-},
 etc.MACHINE)dnl
 dnl
 dnl Copyright (c) 2001-2006 Todd T. Fries <todd@OpenBSD.org>
@@ -139,7 +139,7 @@ ramdisk)
 	;;
 
 _std(2, 3, 76, 16)
-	M openprom	c 70 0 640 kmem
+	M openprom	c 70 0 600
 	M mdesc		c 70 1 640 kmem
 	;;
 dnl