ath79: add WNDR3700 and WNDR3700v2

Add support for WNDR3700 and WNDR3700v2.

They share most things with WNDR3800.
Only device IDs and partition structure needs to be set.

Note: WNDR3700 (v1) has no NETGEAR_HW_ID, but has
      also the NA version of the factory image.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

target/linux/ath79/dts/ar7161_netgear_wndr3700.dts

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "ar7161_netgear_wndr3700.dtsi"
+
+/ {
+	compatible = "netgear,wndr3700", "qca,ar7161";
+	model = "Netgear WNDR3700";
+};
+
+&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 0x780000>;
+	};
+
+	art: partition@7f0000 {
+		label = "art";
+		reg = <0x7f0000 0x010000>;
+		read-only;
+	};
+};

target/linux/ath79/dts/ar7161_netgear_wndr3700v2.dts

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "ar7161_netgear_wndr3700.dtsi"
+
+/ {
+	compatible = "netgear,wndr3700v2", "qca,ar7161";
+	model = "Netgear WNDR3700v2";
+};
+
+&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>;
+	};
+
+	art: partition@ff0000 {
+		label = "art";
+		reg = <0xff0000 0x010000>;
+		read-only;
+	};
+};