ar71xx-generic: backport a few D-Link DIR-505 A1/A2 patches

Fixes #658

patches/openwrt/0113-ar71xx-add-revision-detection-for-D-Link-DIR-505-A1-A2.patch

+From: Matthias Schiffer <mschiffer@universe-factory.net>
+Date: Thu, 28 Jul 2016 15:43:25 +0200
+Subject: ar71xx: add revision detection for D-Link DIR-505 A1/A2
+
+The A1 image also works on the A2, correctly set AR71XX_MODEL in this case.
+
+Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
+
+Backport of LEDE 500a67a167a256002f8ab05171f49dfb86b03260
+
+diff --git a/target/linux/ar71xx/base-files/lib/ar71xx.sh b/target/linux/ar71xx/base-files/lib/ar71xx.sh
+index beca73a..480cf93 100755
+--- a/target/linux/ar71xx/base-files/lib/ar71xx.sh
++++ b/target/linux/ar71xx/base-files/lib/ar71xx.sh
+@@ -107,6 +107,15 @@ cybertan_get_hw_magic() {
+ 	dd bs=8 count=1 skip=0 if=$part 2>/dev/null | hexdump -v -n 8 -e '1/1 "%02x"'
+ }
+ 
++dir505_board_detect() {
++	local dev=$(find_mtd_part 'mac')
++	[ -z "$dev" ] && return
++
++	# The revision is stored at the beginning of the "mac" partition
++	local rev="$(LC_CTYPE=C awk -v 'FS=[^[:print:]]' '{print $1; exit}' $dev)"
++	AR71XX_MODEL="D-Link DIR-505 rev. $rev"
++}
++
+ tplink_get_hwid() {
+ 	local part
+ 
+@@ -453,6 +462,7 @@ ar71xx_board_detect() {
+ 		;;
+ 	*"DIR-505 rev. A1")
+ 		name="dir-505-a1"
++		dir505_board_detect
+ 		;;
+ 	*"DIR-600 rev. A1")
+ 		name="dir-600-a1"

patches/openwrt/0114-ar71xx-don-t-use-D-Link-DIR-505-status-LED-as-ethernet-indicator.patch

+From: Matthias Schiffer <mschiffer@universe-factory.net>
+Date: Thu, 28 Jul 2016 15:59:04 +0200
+Subject: ar71xx: don't use D-Link DIR-505 status LED as ethernet indicator
+
+The stock firmware uses the single LED as status indicator only. Using the
+same LED both for status and as ethernet indicator is uncommon, and has
+been confusing users who were using the device as a WLAN mesh node (so the
+LED was just off, as no ethernet was connected).
+
+Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
+
+Backport of LEDE adbbfb7ff900c489e6be34b2ec2834172dff7943
+
+diff --git a/target/linux/ar71xx/base-files/etc/uci-defaults/01_leds b/target/linux/ar71xx/base-files/etc/uci-defaults/01_leds
+index 9a0d7eb..7c18346 100644
+--- a/target/linux/ar71xx/base-files/etc/uci-defaults/01_leds
++++ b/target/linux/ar71xx/base-files/etc/uci-defaults/01_leds
+@@ -132,10 +132,6 @@ dhp-1565-a1)
+ 	ucidef_set_led_switch "wan" "WAN" "d-link:green:planet" "switch0" "0x20"
+ 	;;
+ 
+-dir-505-a1)
+-	ucidef_set_led_netdev "lan" "LAN" "d-link:green:power" "eth1"
+-	;;
+-
+ dir-600-a1|\
+ dir-615-e1|\
+ dir-615-e4)