fix callbacks error

Author: lezwon

pytorch_lightning/core/decorators.py

@@ -89,7 +89,7 @@ def parameter_validation(fn: Callable) -> Callable:
     def inner_f(self, *args, **kwargs):
         pre_param_count = len(list(self.parameters()))
         module = fn(self, *args, **kwargs)
-        self.on_post_move_to_device()
+        self.trainer.call_hook('on_post_move_to_device')
         post_param_count = len(list(self.parameters()))
 
         if not pre_param_count == post_param_count: