Use RF_PROTECTED_SECTORS instead of a (wrong) magic value.

The bootblock now is able to load ofwboot from a raid1 root.

sys/arch/sparc/stand/bootblk/bootblk.fth

@@ -1,4 +1,4 @@
-\	$NetBSD: bootblk.fth,v 1.5 2003/04/05 08:58:55 he Exp $
+\	$NetBSD: bootblk.fth,v 1.6 2004/06/18 18:42:15 martin Exp $
 \
 \	IEEE 1275 Open Firmware Boot Block
 \
@@ -441,7 +441,7 @@ h# 2000 buffer: indir-block
    then 2drop
    sboff read-super
    sb-buf fs_magic l@ fs_magic_value <>  if
-      64 dup to raid-offset 
+      rf_protected dup to raid-offset 
       dev_bsize * sboff + read-super
       sb-buf fs_magic l@ fs_magic_value <>  if
          ." Invalid superblock magic" cr

sys/arch/sparc/stand/bootblk/genfth.cf

@@ -1,4 +1,4 @@
-#	$NetBSD: genfth.cf,v 1.3 2003/04/05 08:58:55 he Exp $
+#	$NetBSD: genfth.cf,v 1.4 2004/06/18 18:42:15 martin Exp $
 
 #
 # Copyright (c) 1997 The NetBSD Foundation, Inc.
@@ -83,6 +83,7 @@ include <sys/time.h>
 include <ufs/ufs/dinode.h>
 include <ufs/ufs/dir.h>
 include <ufs/ffs/fs.h>
+include <dev/raidframe/raidframevar.h>
 
 #
 # ufs sizing constants
@@ -97,6 +98,9 @@ define	bblock		BBLOCK
 # XXX: Will not work for UFS2!
 define	sblock		SBLOCK_UFS1
 
+# RAID1 boot support
+define	rf_protected	RF_PROTECTED_SECTORS
+
 #
 # ufs superblock
 #