Fix asuswrt ap mode failure (#13693)

* fix asuswrt ap mode failure

When using ap mode, asuswrt device_tracker does dont work properly as ip can not be retrieved from wl command. This version fixed the issue.

* save 1 line code

* another 2 lines saved

* typo correction

homeassistant/components/device_tracker/asuswrt.py

@@ -172,7 +172,7 @@ class AsusWrtDeviceScanner(DeviceScanner):
 
         ret_devices = {}
         for key in devices:
-            if devices[key].ip is not None:
+            if self.mode == 'ap' or devices[key].ip is not None:
                 ret_devices[key] = devices[key]
         return ret_devices