shared-qmi: cleanup UIM client if SIM hot swap setup fails

The cleanup was missing in one of the steps.

src/mm-shared-qmi.c

@@ -3896,6 +3896,7 @@ uim_refresh_register_all_ready (QmiClientUim *client,
         }
 
         mm_obj_dbg (self, "refresh register all operation failed: %s", error->message);
+        g_clear_object (&priv->uim_client);
         g_task_return_error (task, g_steal_pointer (&error));
     } else {
         mm_obj_dbg (self, "registered for all SIM refresh events");