[lantiq] generate uboot environment data in target

With this patch it is possible to generate uboot environment config file
inside lantiq target. Currently it is only supporting GIGASX76X board.

uboot environment config is used by fw_printenv fw_setenv tools.

Signed-off-by: Luka Perkov <openwrt@lukaperkov.net>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30537 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/lantiq/base-files/etc/uci-defaults/uboot_environment

@@ -0,0 +1,32 @@
+#!/bin/sh
+#
+# Copyright (C) 2012 OpenWrt.org
+#
+
+uboot_environment_configuration() {
+	local dev=$1
+	local offset=$2
+	local envsize=$3
+	local secsize=$4
+	local numsec=$5
+	echo "$dev $offset $envsize $secsize $numsec" > /etc/fw_env.config
+}
+
+[ -e /etc/config/fw_env.config ] && exit 0
+
+. /lib/lantiq.sh
+
+board=$(lantiq_board_name)
+
+case "$board" in
+GIGASX76X)
+	uboot_environment_configuration "/dev/mtd1" "0x0" "0x10000" "0x10000" "1"
+	;;
+
+*)
+	# custom foo goes here
+	true
+	;;
+esac
+
+exit 0