[ep93xx] set the mac address using the chip-unique serial number

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23761 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ep93xx/base-files/lib/preinit/05_set_ether_mac_rdc

+#!/bin/sh
+# Copyright (C) 2010 OpenWrt.org
+
+. /lib/functions/boot.sh
+
+set_ether_mac() {
+	mac=$(sed -n 's/^Serial.* 000000/02/p' /proc/cpuinfo)
+	ifconfig eth0 hw ether $mac
+}
+
+boot_hook_add preinit_main set_ether_mac
+