fix registry call (#525)

* fix registry call

* remove await

Author: drc38

custom_components/ocpp/__init__.py

@@ -70,7 +70,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
 
     central_sys = await CentralSystem.create(hass, entry)
 
-    dr = await device_registry.async_get_registry(hass)
+    dr = device_registry.async_get(hass)
 
     """ Create Central System Device """
     dr.async_get_or_create(