ath79: migrate LED paths of TL-WDR4300 board

TL-WDR4300 board uses only green LED names in DTSI.
This patch adds migration for them.

The actual LED colors on the devices have been reported to vary
across subrevisions (v1.x). Despite, the USB LEDs on the back might
have different color than the other LEDs on the front.

Signed-off-by: Sungbo Eo <[email protected]>
[extended commit message]
Signed-off-by: Adrian Schmutzler <[email protected]>

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

@@ -20,7 +20,10 @@ tplink,archer-c7-v4|\
 tplink,archer-c7-v5)
 	migrate_leds "^$boardonly:=tp-link:"
 	;;
-tplink,archer-c7-v2)
+tplink,archer-c7-v2|\
+tplink,tl-wdr3600-v1|\
+tplink,tl-wdr4300-v1|\
+tplink,tl-wdr4300-v1-il)
 	migrate_leds ":blue:=:green:"
 	;;
 tplink,re355-v1)