fix mdev for broadcom 2.6

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6484 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/brcm-2.4/base-files/default/sbin/mount_root

@@ -9,6 +9,18 @@ is_dirty() {
 	return $(hexdump -v $mtdpart -s $OFFSET -n 1 -e '"%d"')
 }
 
+if grep devfs /proc/filesystems > /dev/null; then
+	mount none /dev -t devfs
+else
+	mount -t sysfs none /sys
+	mount -t tmpfs tmpfs /dev -o size=512K
+	mknod /dev/console c 5 1
+	mkdir /dev/shm
+	/sbin/mdev -s
+fi
+mkdir -p /dev/pts
+mount none /dev/pts -t devpts
+
 if [ "$1" != "failsafe" ]; then 
 	mtd unlock linux
 	mount | grep jffs2 >&-
@@ -28,6 +40,4 @@ if [ "$1" != "failsafe" ]; then
 	fi
 fi
 
-mkdir -p /dev/pts
-mount none /dev/pts -t devpts 2>&-
 grep sysfs /proc/filesystems >/dev/null && mount -t sysfs none /sys 2>&-