ramips: add support for Wavlink WL-WN530HG4

Same hardware as Phicomm K2G but different flash layout.

Specification:
- SoC: MediaTek MT7620A
- Flash: 8 MB
- RAM: 64 MB
- Ethernet: 4 FE ports and 1 GE port (RTL8211F on port 5)
- Wireless radio: MT7620 for 2.4G and MT7612E for 5G, both equipped
  with external PA.
- UART: 1 x UART on PCB - 57600 8N1

Flash instruction:
To avoid requiring UART for TFTP a dual flash procedure is suggested
to install the squashfs image:
1. Rename openwrt-ramips-mt7620-wavlink_wl-wn530hg4-initramfs-kernel.bin
   to WN530HG4-WAVLINK.
2. Flash this file with the factory web interface.
3. With OpenWRT now running use standard sysupgrade to install the
   squashfs image.

Signed-off-by: Nuno Goncalves <nunojpg@gmail.com>
[remove dts-v1, remove model from LED labels, wrap commit message]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ramips/mt7620/base-files/etc/board.d/02_network

@@ -193,7 +193,8 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"4:lan" "0:wan" "6@eth0"
 		;;
-	phicomm,k2g)
+	phicomm,k2g|\
+	wavlink,wl-wn530hg4)
 		ucidef_add_switch "switch0" \
 			"0:lan:4" "1:lan:3" "2:lan:2" "3:lan:1" "5:wan" "6@eth0"
 		;;
@@ -334,7 +335,8 @@ ramips_setup_macs()
 	lenovo,newifi-y1|\
 	lenovo,newifi-y1s|\
 	ohyeah,oy-0001|\
-	phicomm,k2g)
+	phicomm,k2g|\
+	wavlink,wl-wn530hg4)
 		wan_mac=$(mtd_get_mac_binary factory 0x2e)
 		;;
 	linksys,e1700)