ath79-generic: (re)add support for wndr3700v2

Gone due to
commit 45c84a117b ("ar71xx: drop target")

docs/user/supported_devices.rst

@@ -41,6 +41,10 @@ ath79-generic
 
   - JT-OR750i
 
+* Netgear
+
+  - WNDR3700 (v2)
+
 * OCEDO
 
   - Raccoon

targets/ath79-generic

@@ -121,6 +121,15 @@ device('joy-it-jt-or750i', 'joyit_jt-or750i', {
 })
 
 
+-- Netgear
+device('netgear-wndr3700-v2', 'netgear_wndr3700-v2', {
+	manifest_aliases = {
+		'netgear-wndr3700v2', -- Upgrade from OpenWrt 19.07
+	},
+	factory_ext = '.img',
+})
+
+
 -- OCEDO
 
 device('ocedo-raccoon', 'ocedo_raccoon', {