gluon-core: set 5GHz rssi leds to mesh1 connectivity

This was missing for quite some time.
For example the dap-x1860 profits from using its LEDs to show the mesh connectivity.

Signed-off-by: Florian Maurer <f.maurer@outlook.de>

package/gluon-core/luasrc/lib/gluon/upgrade/200-wireless

@@ -249,5 +249,10 @@ if uci:get('system', 'rssid_wlan0') then
 	uci:save('system')
 end
 
+if uci:get('system', 'rssid_wlan1') then
+	uci:set('system', 'rssid_wlan1', 'dev', 'mesh1')
+	uci:save('system')
+end
+
 uci:save('wireless')
 uci:save('network')