ramips: add support for Wavlink WL-WN576A2

This commit adds support for the Wavlink WL-WN576A2 wall-plug wireles
repeater / router. It is also sold under the name SilverCrest SWV 733 B1.

Device specs:

- CPU: MediaTek MT7628AN
- Flash: 8MB
- RAM: 64MB
- Bootloader: U-Boot
- Ethernet: 1x 10/100 Mbps
- 2.4 GHz: b/g/n SoC
- 5 GHz: a/n/ac MT7610EN
- Buttons: WPS, reset, sliding switch (ap/repeater)
- LEDs: 5x wifi status, 1x LAN/WAN, 1x WPS

Flashing:

U-Boot launches a TFTP client if WPS button is held during boot.

- Server IP: 192.168.10.100
- Firmware file name: firmware.bin

Device will reboot automatically. First boot takes about 90s.

Coelner (waenger@gmail.com) is the original author, but I have made some
fixes. He does not wish to sign off using his real name.

Signed-off-by: Thomas Aldrian <dev.aldrian@gmail.com>

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

@@ -136,6 +136,9 @@ wavlink,wl-wn575a3)
 	ucidef_set_led_rssi "wifi-med" "wifi-med" "green:wifi-med" "wlan1" "50" "84"
 	ucidef_set_led_rssi "wifi-high" "wifi-high" "green:wifi-high" "wlan1" "85" "100"
 	;;
+wavlink,wl-wn576a2)
+	ucidef_set_led_switch "lan" "lan" "blue:lan" "switch0" "0x10"
+	;;
 wavlink,wl-wn577a2|\
 wavlink,wl-wn578a2)
 	ucidef_set_led_switch "lan" "lan" "green:lan" "switch0" "0x8"

target/linux/ramips/mt76x8/base-files/etc/board.d/02_network

@@ -129,7 +129,8 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:lan" "1:lan" "2:lan" "3:wan" "6@eth0"
 		;;
-	tplink,tl-wr902ac-v3)
+	tplink,tl-wr902ac-v3|\
+	wavlink,wl-wn576a2)
 		ucidef_add_switch "switch0" \
 			"4:lan" "6@eth0"
 		;;
@@ -229,7 +230,8 @@ ramips_setup_macs()
 	onion,omega2|\
 	onion,omega2p|\
 	vocore,vocore2|\
-	vocore,vocore2-lite)
+	vocore,vocore2-lite|\
+	wavlink,wl-wn576a2)
 		label_mac=$(mtd_get_mac_binary factory 0x4)
 		;;
 	rakwireless,rak633|\