ramips: fix leds for TP-Link Archer C20 v4

- add "gpio" group for wan_orange led
- use tpt triggers for wifi led indication
- add wifi 5 GHz led support

Signed-off-by: Maxim Anisimov <maxim.anisimov.ua@gmail.com>
[slight commit message adjustment]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ramips/dts/mt7628an_tplink_archer-c20-v4.dts

@@ -42,11 +42,13 @@
 		wlan5g {
 			label = "archer-c20-v4:green:wlan5g";
 			gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy1tpt";
 		};
 
 		wlan2g {
 			label = "archer-c20-v4:green:wlan2g";
 			gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
 		};
 
 		wps {
@@ -82,7 +84,7 @@
 
 &state_default {
 	gpio {
-		ralink,group = "i2s", "refclk", "p0led_an", "p1led_an", "p2led_an", "p3led_an", "p4led_an", "wdt";
+		ralink,group = "i2s", "gpio", "refclk", "p0led_an", "p1led_an", "p2led_an", "p3led_an", "p4led_an", "wdt";
 		ralink,function = "gpio";
 	};
 };

target/linux/ramips/mt76x8/base-files/etc/board.d/01_leds

@@ -55,7 +55,6 @@ tama,w06)
 tplink,archer-c20-v4)
 	ucidef_set_led_switch "lan" "lan" "$boardname:green:lan" "switch0" "0x1e"
 	ucidef_set_led_switch "wan" "wan" "$boardname:green:wan" "switch0" "0x01"
-	ucidef_set_led_netdev "wlan2g" "wlan2g" "$boardname:green:wlan2g" "wlan0"
 	;;
 tplink,archer-c50-v3|\
 tplink,archer-c50-v4)