mapping UNKNOWN padding to SAME (according to experiment models)

Author: dboyliao

utensor_cgen/backend/utensor/code_generator/rearch/_operators/_impls.py

@@ -349,7 +349,7 @@ def get_eval_snippet(self, op_var_name, op_info, tensor_var_map):
 
 class _CommonParams(_Operator):
   _PADDING_MAP = {
-    0: "UNKNOWN",
+    0: "SAME", # "UNKNOWN",
     1: "VALID",
     2: "SAME"
   }