ath79: rework LED configurations for tplink,archer-d50-v1

The original one has the following problem:
1. Port mask of lan led includes wan port.
2. By using netdev trigger with vlan port, the link led
   is always on.

This commits fixes the above problems by correcting port
mask for lan led and use swconfig trigger for wan leds.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

target/linux/ath79/base-files/etc/board.d/01_leds

@@ -137,9 +137,9 @@ tplink,cpe210-v3)
 	ucidef_set_led_rssi "rssihigh" "RSSIHIGH" "tp-link:green:link4" "wlan0" "80" "100"
 	;;
 tplink,archer-d50-v1)
-	ucidef_set_led_switch "lan" "LAN" "tp-link:white:lan" "switch0" "0x1E"
+	ucidef_set_led_switch "lan" "LAN" "tp-link:white:lan" "switch0" "0x1c"
-	ucidef_set_led_netdev "wan_data" "WAN Data" "tp-link:white:internet" "eth1.2" "tx rx"
+	ucidef_set_led_switch "wan_data" "WAN Data" "tp-link:white:internet" "switch0" "0x02" "" "tx rx"
-	ucidef_set_led_netdev "wan_link" "WAN Link" "tp-link:white:wan" "eth1.2" "link"
+	ucidef_set_led_switch "wan_link" "WAN Link" "tp-link:white:wan" "switch0" "0x02" "" "link"
 	;;
 tplink,re450-v2)
 	ucidef_set_led_netdev "lan_data" "LAN Data" "tp-link:green:lan_data" "eth0" "tx rx"