ramips: add support for I-O DATA WN-AC1167GR

I-O DATA WN-AC1167GR is a 2.4/5 GHz band 11ac router, based on
MediaTek MT7620A.

Specification:

- SoC     : MediaTek MT7620A
- RAM     : DDR2 64 MB
- Flash   : SPI-NOR 8MB
- WLAN    : 2.4/5 GHz, 2T2R
  - 2.4 GHz: MT7620A (SoC)
  - 5 GHz  : MT7612E
- Ethernet: 10/100/1000 Mbps (ext. MT7530)
- LED/key : 4x/3x (2x buttons, 1x slide-switch)
- UART    : through-hole on PCB
  - J2: TX, GND, RX, Vcc from SoC side
  - 115200n8

Flash instruction using factory image:

1. Boot WN-AC1167GR normaly
2. Access to "http://192.168.0.1/" and open firmware update page
("ファームウェア")
3. Select the OpenWrt factory image and click update ("更新") button
to perform firmware update
4. Wait ~150 seconds to complete flashing

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>

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

@@ -319,6 +319,10 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"1:lan" "2:lan" "3:lan" "4:lan" "5:lan" "0:wan" "6@eth0"
 		;;
+	iodata,wn-ac1167gr)
+		ucidef_add_switch "switch1" \
+			"1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1" "0:wan" "6@eth0"
+		;;
 	kn_rf)
 		ucidef_add_switch "switch0" \
 			"0:wan" "1:lan" "2:lan" "3:lan" "4:lan" "6@eth0"
@@ -525,6 +529,9 @@ ramips_setup_macs()
 		[ -n "$lan_mac" ] || lan_mac=$(cat /sys/class/net/eth0/address)
 		wan_mac=$(macaddr_add "$lan_mac" 1)
 		;;
+	iodata,wn-ac1167gr)
+		wan_mac=$(macaddr_add "$(mtd_get_mac_binary Factory 4)" -1)
+		;;
 	iodata,wn-ax1167gr|\
 	iodata,wn-gx300gr)
 		wan_mac=$(macaddr_add "$(mtd_get_mac_binary Factory 4)" 1)