dtoc: Make _output_list a top-level function

It is annoying to have this function inside its parent since it makes the
parent longer and hard to read. Move it to the top level.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/dtoc/dtb_platdata.py

@@ -592,13 +592,7 @@ class DtbPlatdata():
                 self.out(';\n')
             self.out('};\n')
 
-    def output_node(self, node):
-        """Output the C code for a node
-
-        Args:
-            node (fdt.Node): node to output
-        """
-        def _output_list(node, prop):
+    def _output_list(self, node, prop):
         """Output the C code for a devicetree property that holds a list
 
         Args:
@@ -637,6 +631,12 @@ class DtbPlatdata():
                 self.buf(', '.join(vals[i:i + 8]))
         self.buf('}')
 
+    def output_node(self, node):
+        """Output the C code for a node
+
+        Args:
+            node (fdt.Node): node to output
+        """
         struct_name, _ = self.get_normalized_compat_name(node)
         var_name = conv_name_to_c(node.name)
         self.buf('/* Node %s index %d */\n' % (node.path, node.idx))
@@ -651,7 +651,7 @@ class DtbPlatdata():
 
             # Special handling for lists
             if isinstance(prop.value, list):
-                _output_list(node, prop)
+                self._output_list(node, prop)
             else:
                 self.buf(get_value(prop.type, prop.value))
             self.buf(',\n')