binman: Allow cipher node as special section

The new encrypted etype generates a cipher node in the device tree
that should not be evaluated by binman, but still be kept in the
output device tree.

Signed-off-by: Christian Taedcke <christian.taedcke@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

tools/binman/etype/section.py

@@ -179,7 +179,7 @@ class Entry_section(Entry):
         Returns:
             bool: True if the node is a special one, else False
         """
-        start_list = ('hash', 'signature', 'template')
+        start_list = ('cipher', 'hash', 'signature', 'template')
         return any(node.name.startswith(name) for name in start_list)
 
     def ReadNode(self):