ramips: add support for ALFA Network AC1200RM

ALFA Network AC1200RM is an AC1200 router, with 5-port FE switch and
USB 2.0 port. Device is based on MediaTek MT7620A + MT7612EN.

Specification:

- MT7620A (580 MHz)
- 64 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 5x 10/100 Mbps Ethernet with passive PoE output in WAN and LAN4
- 2T2R 2.4 GHz (MT7620A)
- 2T2R 5 GHz (MT7612EN)
- 1x USB 2.0
- 9x LED (8 driven by GPIO)
- 1x button (reset)
- DC jack for main power input (12-24 V)
- 2x UART, I2C, I2S and LED headers

Flash instruction (do it under U-Boot, using UART and TFTP server):

Select option "2: Load system code then write to Flash via TFTP" and
use "sysupgrade" image.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

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

@@ -56,6 +56,10 @@ air3gii)
 	set_wifi_led "$boardname:green:wlan"
 	set_usb_led "$boardname:green:mobile"
 	;;
+alfa-network,ac1200rm)
+	set_wifi_led "$boardname:green:wlan2g" "wlan1"
+	ucidef_set_led_default "wps" "wps" "$boardname:green:wps" "0"
+	;;
 all0256n-4M|\
 all0256n-8M)
 	ucidef_set_rssimon "wlan0" "200000" "1"

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

@@ -71,6 +71,7 @@ ramips_setup_interfaces()
 		;;
 	3g-6200n|\
 	ai-br100|\
+	alfa-network,ac1200rm|\
 	d240|\
 	db-wrt01|\
 	dir-300-b7|\

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

@@ -69,6 +69,13 @@ get_status_led() {
 	ht-tm02)
 		status_led="$boardname:blue:wlan"
 		;;
+	alfa-network,ac1200rm|\
+	awapn2403|\
+	dir-645|\
+	sk-wb8|\
+	wrh-300cr)
+		status_led="$boardname:green:wps"
+		;;
 	all0239-3g|\
 	dcs-930|\
 	dir-300-b1|\
@@ -102,12 +109,6 @@ get_status_led() {
 	ip2202)
 		status_led="$boardname:green:run"
 		;;
-	awapn2403|\
-	dir-645|\
-	sk-wb8|\
-	wrh-300cr)
-		status_led="$boardname:green:wps"
-		;;
 	c108)
 		status_led="$boardname:green:lan"
 		;;

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

@@ -16,6 +16,7 @@ platform_check_image() {
 	a5-v11|\
 	ai-br100|\
 	air3gii|\
+	alfa-network,ac1200rm|\
 	all0239-3g|\
 	all0256n-4M|\
 	all0256n-8M|\