ramips: add support for ALFA Network AWUSFREE1

ALFA Network AWUSFREE1 is an USB Wi-Fi N300 adapter based on MT7628.

Specification:

- MT7628AN (580 MHz)
- 64 MB of RAM (DDR2)
- 8 MB of FLASH (SPI NOR)
- 2T2R 2.4 GHz (MT7628) with external FEM (RFFM4203)
- 2x detachable antennas (RP-SMA)
- ASIX AX88772 USB to Ethernet bridge (connected with MT7628 PHY0)
- 4x LED (2 driven by GPIO)
- 1x button (reset)
- 1x mini USB for host and main power input
- UART header on PCB

Flash instruction:

You can use sysupgrade image directly in vendor firmware which is based
on LEDE/OpenWrt. Alternatively, you can use web recovery mode in U-Boot:

1. Power device with reset button pressed and release it after ~5 sec.
2. Setup static IP 192.168.1.2/4 on your PC.
3. Go to 192.168.1.1 in browser and upload "sysupgrade" image.

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

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

@@ -60,6 +60,9 @@ alfa-network,ac1200rm)
 	set_wifi_led "$boardname:green:wlan2g" "wlan1"
 	ucidef_set_led_default "wps" "wps" "$boardname:green:wps" "0"
 	;;
+alfa-network,awusfree1)
+	set_wifi_led "$boardname:blue:wlan"
+	;;
 all0256n-4M|\
 all0256n-8M)
 	ucidef_set_rssimon "wlan0" "200000" "1"

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

@@ -126,6 +126,27 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "6@eth0"
 		;;
+	alfa-network,awusfree1|\
+	cs-qr10|\
+	d105|\
+	dlink,dap-1522-a1|\
+	dch-m225|\
+	ex2700|\
+	ex3700|\
+	hpm|\
+	mzk-ex300np|\
+	mzk-ex750np|\
+	na930|\
+	pbr-d1|\
+	tama,w06|\
+	u25awf-h1|\
+	wli-tx4-ag300n|\
+	wmdr-143n|\
+	wmr-300|\
+	wn3000rpv3|\
+	wrh-300cr)
+		ucidef_set_interface_lan "eth0"
+		;;
 	mir3g)
 		ucidef_add_switch "switch0" \
 			"2:lan:2" "3:lan:1" "1:wan" "6t@eth0"
@@ -237,26 +258,6 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "9@eth0"
 		;;
-	cs-qr10|\
-	d105|\
-	dlink,dap-1522-a1|\
-	dch-m225|\
-	ex2700|\
-	ex3700|\
-	hpm|\
-	mzk-ex300np|\
-	mzk-ex750np|\
-	na930|\
-	pbr-d1|\
-	tama,w06|\
-	u25awf-h1|\
-	wli-tx4-ag300n|\
-	wmdr-143n|\
-	wmr-300|\
-	wn3000rpv3|\
-	wrh-300cr)
-		ucidef_set_interface_lan "eth0"
-		;;
 	duzun-dm06)
 		ucidef_add_switch "switch0" \
 			"1:lan" "0:wan" "6@eth0"

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

@@ -78,6 +78,9 @@ get_status_led() {
 	wrh-300cr)
 		status_led="$boardname:green:wps"
 		;;
+	alfa-network,awusfree1)
+		status_led="$boardname:orange:system"
+		;;
 	all0239-3g|\
 	dcs-930|\
 	dir-300-b1|\

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

@@ -17,6 +17,7 @@ platform_check_image() {
 	ai-br100|\
 	air3gii|\
 	alfa-network,ac1200rm|\
+	alfa-network,awusfree1|\
 	all0239-3g|\
 	all0256n-4M|\
 	all0256n-8M|\