ramips-mt7621: add support netgear eax12 (#3433)

this is the same device as the EAX 11 v2 and EAX 15 v2

docs/user/supported_devices.rst

@@ -465,6 +465,9 @@ ramips-mt7621
 
 * TP-Link
 
+  - EAX11 (v2)
+  - EAX12
+  - EAX15 (v2)
   - EAP615-Wall (v1)
   - RE500 (v1)
   - RE650 (v1)

targets/ramips-mt7621

@@ -67,6 +67,11 @@ device('mercusys-mr70x-v1', 'mercusys_mr70x-v1')
 
 -- NETGEAR
 
+device('netgear-eax12', 'netgear_eax12', {
+	factory_ext = '.img',
+	aliases = {'netgear-eax11-v2', 'netgear-eax15-v2'},
+})
+
 device('netgear-ex6150', 'netgear_ex6150', {
 	factory_ext = '.chk',
 })