Use new config entry update/abort helper in powerwall

Use new config entry update/abort helper in powerwall

uses the new helper from #108034

homeassistant/components/powerwall/config_flow.py

@@ -258,11 +258,9 @@ async def async_step_reauth_confirm(
                 {CONF_IP_ADDRESS: entry_data[CONF_IP_ADDRESS], **user_input}
             )
             if not errors:
-                self.hass.config_entries.async_update_entry(
+                return self.async_update_reload_and_abort(
                     self.reauth_entry, data={**entry_data, **user_input}
                 )
-                await self.hass.config_entries.async_reload(self.reauth_entry.entry_id)
-                return self.async_abort(reason="reauth_successful")
 
         return self.async_show_form(
             step_id="reauth_confirm",