ath79: add support for the Netgear WNDRMAC v2

The Netgear WNDRMAC v2 is a hardware variant of the Netgear WNDR3800

Specifications
==============
* SoC: Atheros AR7161
* RAM: 128mb
* Flash on board: 16mb
* WiFi: Atheros AR9220 (a/n), Atheros AR9223 (b/g/n)
* Ethernet: RealTek RTL8366SR (1xWAN, 4xLAN, Gigabit)
* Serial console: Yes, 115200 / 8N1 (JTAG)
* USB: 1x2.0
* Power: 12 VDC, 2.5 A
* Full specs on [openwrt.org](https://openwrt.org/toh/hwdata/netgear/netgear_wndrmac_v2)

Flash Instructions
==================
It is possible to use the OEM Upgrade page to install the `factory`
variant of the firmware.

After the initial upgrade, you will need to telnet into the router
(default IP 192.168.1.1) to install anything. You may install LuCI
this way. At this point, you will have a web interface to configure
OpenWRT on the WNDRMAC v2.

Please use the `sysupgrade` variant for subsequent flashes.

Recovery Instructions
=====================
A TFTP-based recovery flash is possible if the need arises. Please refer
to the WNDR3800 page on openwrt.org for details.

https://openwrt.org/toh/netgear/wndr3800#recovery_flash_in_failsafe_mode

Signed-off-by: Renaud Lepage <root@cybikbase.com>
[do not add device to uboot-envtools, update DTSI name]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ath79/dts/ar7161_netgear_wndrmac-v2.dts

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "ar7161_netgear_wndr.dtsi"
+
+/ {
+	compatible = "netgear,wndrmac-v2", "qca,ar7161";
+	model = "Netgear WNDRMAC v2";
+};
+
+&partitions {
+	partition@0 {
+		label = "u-boot";
+		reg = <0x000000 0x050000>;
+		read-only;
+	};
+
+	partition@50000 {
+		label = "u-boot-env";
+		reg = <0x050000 0x020000>;
+		read-only;
+	};
+
+	partition@70000 {
+		label = "firmware";
+		reg = <0x070000 0xf80000>;
+		compatible = "netgear,uimage";
+	};
+
+	art: partition@ff0000 {
+		label = "art";
+		reg = <0xff0000 0x010000>;
+		read-only;
+	};
+};

target/linux/ath79/generic/base-files/etc/board.d/02_network

@@ -204,7 +204,8 @@ ath79_setup_interfaces()
 	netgear,wndr3700|\
 	netgear,wndr3700-v2|\
 	netgear,wndr3800|\
-	netgear,wndr3800ch)
+	netgear,wndr3800ch|\
+	netgear,wndrmac-v2)
 		ucidef_set_interface_wan "eth1"
 		ucidef_add_switch "switch0" \
 			"0:lan:4" "1:lan:3" "2:lan:2" "3:lan:1" "5u@eth0"
@@ -430,7 +431,8 @@ ath79_setup_macs()
 		;;
 	netgear,wndr3700|\
 	netgear,wndr3700-v2|\
-	netgear,wndr3800)
+	netgear,wndr3800|\
+	netgear,wndrmac-v2)
 		lan_mac=$(macaddr_setbit_la "$(mtd_get_mac_binary art 0x0)")
 		;;
 	phicomm,k2t)

target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom

@@ -127,7 +127,8 @@ case "$FIRMWARE" in
 	netgear,wndr3700|\
 	netgear,wndr3700-v2|\
 	netgear,wndr3800|\
-	netgear,wndr3800ch)
+	netgear,wndr3800ch|\
+	netgear,wndrmac-v2)
 		caldata_extract "art" 0x1000 0xeb8
 		;;
 	dlink,dir-825-b1)
@@ -145,7 +146,8 @@ case "$FIRMWARE" in
 	netgear,wndr3700|\
 	netgear,wndr3700-v2|\
 	netgear,wndr3800|\
-	netgear,wndr3800ch)
+	netgear,wndr3800ch|\
+	netgear,wndrmac-v2)
 		caldata_extract "art" 0x5000 0xeb8
 		;;
 	dlink,dir-825-b1)

target/linux/ath79/image/generic.mk

@@ -932,6 +932,18 @@ define Device/netgear_wndr3800ch
 endef
 TARGET_DEVICES += netgear_wndr3800ch
 
+define Device/netgear_wndrmac-v2
+  $(Device/netgear_wndr3x00)
+  DEVICE_MODEL := WNDRMAC
+  DEVICE_VARIANT := v2
+  NETGEAR_KERNEL_MAGIC := 0x33373031
+  NETGEAR_BOARD_ID := WNDRMACv2
+  NETGEAR_HW_ID := 29763654+16+128
+  IMAGE_SIZE := 15872k
+  SUPPORTED_DEVICES += wndr3700
+endef
+TARGET_DEVICES += netgear_wndrmac-v2
+
 define Device/netgear_wnr2200_common
   SOC := ar7241
   DEVICE_MODEL := WNR2200