ramips: add support for D-Link DAP-1522 A1

D-Link DAP-1522 is a wireless bridge/access point with 4 LAN
ports and a dual-band wireless chipset.

Specifications:
- Ralink RT2880
- 32 MB of RAM
- 4 MB of Flash
- 4x 10/100/1000 Mbps Ethernet (RTL8366SR)
- 802.11abgn (RT2850)

Flash Instructions:
1. Download lede-ramips-rt288x-dap-1522-a1-squashfs-factory.bin
2. Open the web interface and upload the image

Signed-off-by: George Hopkins <george-hopkins@null.net>

target/linux/ramips/base-files/etc/uci-defaults/09_fix-checksum

@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+# Copyright (C) 2012 OpenWrt.org
+#
+
+. /lib/functions.sh
+
+fix_checksum() {
+	local kernel_size=$(sed -n 's/mtd[0-9]*: \([0-9a-f]*\).*"kernel".*/\1/p' /proc/mtd)
+
+	[ "$kernel_size" ] && mtd -c 0x$kernel_size fix$1 firmware
+}
+
+board=$(board_name)
+
+case "$board" in
+cy-swr1100 | \
+dch-m225 | \
+dir-645 | \
+dir-860l-b1)
+	fix_checksum seama
+	;;
+dap-1522-a1)
+	fix_checksum wrg
+	;;
+esac