ath79: split base-files into subtargets

While most of the target's contents are split into subtargets, the
base-files are maintained for the target as a whole.

However, OpenWrt already implements a mechanism that will use (and
even prefer) files in the subtargets' directories. This can be
exploited to make several scripts subtarget-specific and thus save
some space (especially helpful for the tiny devices).

The only script remaining in parent base-files is
/etc/hotplug.d/ieee80211/00-wifi-migration, everything else is
moved/split.

Note that this will increase overall code lines, but reduce code
per subtarget.

base-files ipk size reduction:
master (generic)   49135 B
split (generic)    48533 B (- 0.6 kiB)
split (tiny)       43337 B (- 5.7 kiB)
split (nand)       44423 B (- 4.6 kiB)

Tested on TL-WR1043ND v4 (generic) and TL-WR841N v12 (tiny).

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ath79/generic/base-files/etc/uci-defaults/04_led_migration

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+. /lib/functions.sh
+. /lib/functions/migrations.sh
+
+board=$(board_name)
+boardonly="${board##*,}"
+
+case "$board" in
+engenius,epg5000)
+	migrate_leds ":wlan-2g=:wlan2g" ":wlan-5g=:wlan5g"
+	;;
+tplink,archer-c25-v1|\
+tplink,archer-c58-v1|\
+tplink,archer-c59-v1|\
+tplink,archer-c59-v2|\
+tplink,archer-c60-v1|\
+tplink,archer-c60-v2|\
+tplink,archer-c7-v4|\
+tplink,archer-c7-v5)
+	migrate_leds "^$boardonly:=tp-link:"
+	;;
+tplink,archer-c7-v2)
+	migrate_leds ":blue:=:green:"
+	;;
+tplink,re355-v1)
+	migrate_leds "re355:=tp-link:"
+	;;
+tplink,re450-v1)
+	migrate_leds "re450:=tp-link:"
+	;;
+wd,mynet-n750)
+	migrate_leds "wd:=mynet-n750:"
+	;;
+esac
+
+migrations_apply system
+
+exit 0

target/linux/ath79/generic/base-files/etc/uci-defaults/09_fix-checksum

@@ -0,0 +1,15 @@
+#!/bin/sh
+. /lib/functions.sh
+
+fix_seama_header() {
+	local kernel_size=$(sed -n 's/mtd[0-9]*: \([0-9a-f]*\).*"kernel".*/\1/p' /proc/mtd)
+	[ "$kernel_size" ] && mtd -c 0x$kernel_size fixseama firmware
+}
+
+board=$(board_name)
+
+case "$board" in
+qihoo,c301)
+	fix_seama_header
+	;;
+esac