ixp4xx: add sysupgrade support

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

 target/linux/ixp4xx/base-files/lib/ixp4xx.sh           |   25 ++
 target/linux/ixp4xx/base-files/lib/upgrade/platform.sh |  156 +++++++++++++++++
 target/linux/ixp4xx/image/Makefile                     |   11 +
 3 files changed, 192 insertions(+)

SVN-Revision: 33828

target/linux/ixp4xx/base-files/lib/ixp4xx.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+#
+# Copyright (C) 2012 OpenWrt.org
+#
+
+ixp4xx_board_name() {
+        local machine
+        local name
+
+        machine=$(awk 'BEGIN{FS="[ \t]+:[ \t]"} /Hardware/ {print $2}' /proc/cpuinfo)
+
+        case "$machine" in
+		"Gateworks Cambria"*)
+			name="cambria"
+			;;
+		"Gateworks Avila"*)
+			name="avila"
+			;;
+		*)
+			name="generic";
+			;;
+	esac
+
+	echo $name
+}