ramips: add support for WAVLINK WL-WN577A2

This commit adds support for the Wavlink WL-WN577A2 (black case) dual-band
wall-plug wireless router. In Germany this device is sold under the brand
name Maginon WL-755 (white case):

Device specifications:

- CPU: MediaTek MT7628AN (580MHz)
- Flash: 8MB
- RAM: 64MB
- Bootloader: U-Boot
- Ethernet: 2x 10/100 Mbps (Ralink RT3050)
- 2.4 GHz: 802.11b/g/n SoC
- 5 GHz: 802.11a/n/ac MT7610E
- Antennas: internal
- 4 green LEDs: 1 programmable (WPS) + LAN, WAN, POWER
- Buttons: Reset, WPS
- Small sliding power switch

Flashing instructions (U-boot):

- Configure a TFTP server on your PC/Laptop and set its IP
  to 192.168.10.100

- Rename the OpenWrt image to firmware.bin and place it in the
  root folder of the TFTP server

- Power off (using the small sliding power switch on the left
  side) the device and connect an ethernet cable from its LAN
  or WAN port to your PC/Laptop

- Press the WPS button (and keep it pressed)

- Power on the device (using the small power switch)

- After a few seconds, when the WAN/LAN LED stops blinking
  very fast, release the WPS button

- Flashing OpenWrt takes less than a minute, system will
  reboot automatically

- After reboot the WPS LED will indicate the current OpenWrt
  running status

Signed-off-by: Lars Wessels <software@bytebox.org>
[removed unused labels - fix whitespace errors - wrap commit message]
Signed-off-by: David Bauer <mail@david-bauer.net>

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

@@ -122,6 +122,10 @@ wavlink,wl-wn575a3)
 	ucidef_set_led_rssi "wifi-med" "wifi-med" "$boardname:green:wifi-med" "wlan1" "50" "84"
 	ucidef_set_led_rssi "wifi-high" "wifi-high" "$boardname:green:wifi-high" "wlan1" "85" "100"
 	;;
+wavlink,wl-wn577a2)
+	ucidef_set_led_switch "lan" "lan" "$boardname:green:lan" "switch0" "0x8"
+	ucidef_set_led_switch "wan" "wan" "$boardname:green:wan" "switch0" "0x10"
+	;;
 zbtlink,zbt-we1226)
 	set_wifi_led "$boardname:green:wlan"
 	ucidef_set_led_switch "lan1" "LAN1" "$boardname:green:lan1" "switch0" "0x01"

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

@@ -38,7 +38,8 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "6@eth0"
 		;;
-	buffalo,wcr-1166ds)
+	buffalo,wcr-1166ds|\
+	wavlink,wl-wn577a2)
 		ucidef_add_switch "switch0" \
 			"3:lan" "4:wan" "6@eth0"
 		;;
@@ -186,6 +187,10 @@ ramips_setup_macs()
 	wiznet,wizfi630s)
 		wan_mac=$(macaddr_add "$(mtd_get_mac_binary factory 0x28)" 1)
 		;;
+	wavlink,wl-wn577a2)
+		wan_mac=$(mtd_get_mac_binary factory 0x2e)
+		label_mac=$(mtd_get_mac_binary factory 0x4)
+		;;
 	skylab,skw92a|\
 	totolink,lr1200)
 		wan_mac=$(mtd_get_mac_binary factory 0x2e)