ath79-generic: (re)add support for NanoBeam M5 (XW) (#2432)

Gone due to
commit 071cf7b2 ("Switch to Lua for target definitions")

Has prior been introduced as untested -> broken in
commit d586720c ("ar71xx-generic: add support for Ubiquiti NanoBeam M5")

Was commented out in the former commit.

docs/user/supported_devices.rst

@@ -102,6 +102,7 @@ ath79-generic
 
 * Ubiquiti
 
+  - NanoBeam M5 (XW)
   - NanoStation M2/M5 (XW)
   - UniFi AC Lite
   - UniFi AC LR

package/gluon-core/luasrc/usr/lib/lua/gluon/platform.lua

@@ -37,6 +37,7 @@ function M.is_outdoor_device()
 		'tplink,eap225-outdoor-v1',
 		'tplink,wbs210-v1',
 		'tplink,wbs210-v2',
+		'ubnt,nanobeam-m5-xw',
 		'ubnt,nanostation-m-xw',
 		'ubnt,unifi-ap-outdoor-plus',
 		'ubnt,unifiac-mesh',

targets/ath79-generic

@@ -457,6 +457,8 @@ device('ubiquiti-unifi-ap', 'ubnt_unifi', {
 	},
 })
 
+device('ubiquiti-nanobeam-m5-xw', 'ubnt_nanobeam-m5-xw')
+
 device('ubiquiti-unifi-ap-outdoor+', 'ubnt_unifi-ap-outdoor-plus', {
 	manifest_aliases = {
 		'ubiquiti-unifiap-outdoor+', -- upgrade from OpenWrt 19.07