ath79-generic: (re)add AVM Fritz!WLAN Repeater 450e (#2420)

Gone due to
commit 45c84a11 ("ar71xx: drop target")

docs/user/supported_devices.rst

@@ -4,6 +4,10 @@ Supported Devices & Architectures
 ath79-generic
 --------------
 
+* AVM
+
+  - Fritz!WLAN Repeater 450E [#avmflash]_
+
 * devolo
 
   - WiFi pro 1200e [#lan_as_wan]_

targets/ath79-generic

@@ -22,6 +22,12 @@ local ATH10K_PACKAGES_QCA9888 = {
 	'-ath10k-firmware-qca9888-ct',
 }
 
+-- AVM
+
+device('avm-fritz-wlan-repeater-450e', 'avm_fritz450e', {
+	factory = false,
+})
+
 -- devolo
 
 device('devolo-wifi-pro-1200e', 'devolo_dvl1200e', {