ramips: add support for the YouHua WR1200JS

YouHua tech WR1200JS is an AC1200 router with 5 1Gb ports (4 Lan, 1 Wan)
and 1 USB 2.0 port.

Devices is base on MediaTek MT7621AT + MT7603E + MT7612E.

Specification:

- MT7612AT (880 MHz)
- 128 MB of RAM
- 16 MB of FLASH (SPI NOR)
- 5x 10/100/1000 Mbps Ethernet
- 2T2R 2.4 GHz (MT7603E)
- 2T2R 5 GHz (MT7612E)
- 1x USB 2.0
- 10x LED (Power 2G 5G WPS Internet LAN4-1 USB)
- 3x button (reset wifi wps)
- DC jack for main power input (12V)

Installation:

1.) Press reset key 5 sec and restore the factory default
2.) Login webUI and change username to root and set a
    new password
3.) Visit http://192.168.2.254/adm/telnetd.shtml and
    turn on the telnet service
4.) Copy openwrt-ramips-mt7621-youhua_wr1200js-initramfs-kernel.bin
    to a usb pan
5.) Plug the usb pan to the router, telnet to the router
    and login by root
6.) cd /media/sda1 and check the initramfs file is there
7.) exec command:
    mtd_write write openwrt-ramips-mt7621-youhua_wr1200js-initramfs-kernel.bin Kernel
8.) reboot and visit 192.168.1.1

Signed-off-by: Zheng Qian <sotux82@gmail.com>

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

@@ -495,6 +495,11 @@ y1s)
 	ucidef_set_led_netdev "wifi5g" "WIFI5G" "$boardname:blue:wifi" "wlan0"
 	ucidef_set_led_netdev "wan" "WAN" "$boardname:blue:internet" "eth0.2" "tx rx"
 	;;
+youhua,wr1200js)
+	ucidef_set_led_switch "internet" "INTERNET" "$boardname:green:wan" "switch0" "0x01"
+	ucidef_set_led_usbdev "usb" "USB" "$boardname:blue:usb" "1-2"
+	ucidef_set_led_default "wps" "wps" "$boardname:blue:wps" "0"
+	;;
 zbt-ape522ii)
 	ucidef_set_led_netdev "wlan2g4" "wlan1-link" "$boardname:green:wlan2g4" "wlan1"
 	ucidef_set_led_netdev "sys1" "wlan1" "$boardname:green:sys1" "wlan1" "tx rx"

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

@@ -210,6 +210,7 @@ ramips_setup_interfaces()
 	wrtnode|\
 	wrtnode2p | \
 	wrtnode2r | \
+	youhua,wr1200js|\
 	zbt-wa05)
 		ucidef_add_switch "switch0" \
 			"1:lan" "2:lan" "3:lan" "4:lan" "0:wan" "6@eth0"

target/linux/ramips/base-files/etc/diag.sh

@@ -132,7 +132,8 @@ get_status_led() {
 		status_led="$boardname:yellow:status"
 		;;
 	cy-swr1100|\
-	w502u)
+	w502u|\
+	youhua,wr1200js)
 		status_led="$boardname:blue:wps"
 		;;
 	d240|\