fix: TreeNode has same name with NodeMixin

NodeMixin have attrubute called size and it is set property.
This patch fixed this issue.

reference: https://github.com/c0fec0de/anytree/blob/main/anytree/node/nodemixin.py

tools/size_report.py

@@ -12,6 +12,7 @@
 Process an ELF file to generate size report on RAM and ROM.
 """
 
+import pdb
 import argparse
 import json
 import os
@@ -530,14 +531,22 @@ class TreeNode(NodeMixin):
     def __init__(self, name, identifier, size=0, parent=None, children=None):
         super().__init__()
         self.name = name
-        self.size = size
+        self._size = size
         self.parent = parent
         self.identifier = identifier
         if children:
             self.children = children
 
     def __repr__(self):
         return self.name
+
+    @property
+    def size(self):
+        return self._size
+
+    @size.setter
+    def size(self, value):
+        self._size = value
 
 
 def sum_node_children_size(node):