ramips: add support for D-Link DWR-118-A2

The DWR-118-A2 Wireless Router is based on the MT7620A SoC.

Specification:

- MediaTek MT7620A (580 Mhz)
- 128 MB of RAM
- 16 MB of FLASH
- 1x 802.11bgn radio
- 1x 802.11ac radio (MT7612EN)
- 4x 10/100 Mbps Ethernet (1 WAN and 3 LAN)
- 1x 10/100/1000 Mbps Marvell Ethernet PHY (1 LAN)
- 2x external, non-detachable antennas
- 1x USB 2.0
- UART (J1) header on PCB (57600 8n1)
- 7x LED (5x GPIO-controlled), 2x button
- JBOOT bootloader

Known issues:
- GELAN not working
- flash is very slow

The status led has been assigned to the dwr-118-a2:green:internet led.
At the end of the boot it is switched off and is available for other
operation. Work correctly also during sysupgrade operation.

Installation:
Apply factory image via http web-gui or JBOOT recovery page

How to revert to OEM firmware:
- push the reset button and turn on the power. Wait until LED start
  blinking (~10sec.)
- upload original factory image via JBOOT http (IP: 192.168.123.254)

Signed-off-by: Cezary Jackiewicz <cezary@eko.one.pl>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>

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

@@ -162,6 +162,13 @@ dlink,dwr-116-a1|\
 mzk-ex300np)
 	set_wifi_led "$boardname:green:wifi"
 	;;
+dlink,dwr-118-a2)
+	ucidef_set_led_switch "lan" "lan" "$boardname:green:lan" "switch0" "0x0e"
+	ucidef_set_led_switch "wan" "wan" "$boardname:green:wan" "switch0" "0x01"
+	set_wifi_led "$boardname:green:wlan2g" "wlan1"
+	set_usb_led "$boardname:green:usb"
+	ucidef_set_led_default "internet" "internet" "$boardname:green:internet" "0"
+	;;
 dlink,dwr-921-c1)
 	set_wifi_led "$boardname:green:wifi"
 	ucidef_set_led_switch "lan" "lan" "$boardname:green:lan" "switch0" "0x0f"

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

@@ -157,6 +157,10 @@ ramips_setup_interfaces()
 	wrh-300cr)
 		ucidef_set_interface_lan "eth0"
 		;;
+	dlink,dwr-118-a2)
+		ucidef_add_switch "switch0" \
+			"1:lan:2" "2:lan:1" "3:lan:3" "4:lan" "0:wan" "6@eth0"
+		;;
 	mir3g)
 		ucidef_add_switch "switch0" \
 			"2:lan:2" "3:lan:1" "1:wan" "6t@eth0"
@@ -462,6 +466,7 @@ ramips_setup_macs()
 		wan_mac=$(mtd_get_mac_ascii factory wanmac)
 		;;
 	dlink,dwr-116-a1|\
+	dlink,dwr-118-a2|\
 	dlink,dwr-921-c1)
 		wan_mac=$(jboot_config_read -m -i $(find_mtd_part "config") -o 0xE000)
 		lan_mac=$(macaddr_add "$wan_mac" 1)

target/linux/ramips/base-files/etc/hotplug.d/firmware/10-rt2x00-eeprom

@@ -55,6 +55,7 @@ case "$FIRMWARE" in
 "soc_wmac.eeprom")
 	case $board in
 	dlink,dwr-116-a1|\
+	dlink,dwr-118-a2|\
 	dlink,dwr-921-c1)
 		wan_mac=$(jboot_config_read -m -i $(find_mtd_part "config") -o 0xE000)
 		wifi_mac=$(macaddr_add "$wan_mac" 1)

target/linux/ramips/base-files/lib/upgrade/platform.sh

@@ -289,6 +289,7 @@ platform_check_image() {
 		return 0
 		;;
 	dlink,dwr-116-a1|\
+	dlink,dwr-118-a2|\
 	dlink,dwr-921-c1|\
 	dwr-512-b)
 		[ "$magic" != "0404242b" ] && {