!14534 fix get seed validation

From: @gong_zi_yan
Reviewed-by: @stsuteng,@kisnwang
Signed-off-by: @stsuteng

mindspore/parallel/_utils.py

@@ -145,7 +145,7 @@ def _get_parameter_broadcast():
     parallel_mode = auto_parallel_context().get_parallel_mode()
     parameter_broadcast = auto_parallel_context().get_parameter_broadcast()
 
-    if parallel_mode in ("data_parallel", "hybrid_parallel") and parameter_broadcast is False and get_seed is None:
+    if parallel_mode in ("data_parallel", "hybrid_parallel") and parameter_broadcast is False and get_seed() is None:
         logger.warning("You are suggested to use mindspore.context.set_auto_parallel_context(parameter_broadcast=True)"
                        " or mindspore.common.set_seed() to share parameters among multi-devices.")