patman: Convert camel case in tools.py

Convert this file to snake case and update all files which use it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/buildman/control.py b/tools/buildman/control.py
index eee8113..e8a531e 100644
--- a/tools/buildman/control.py
+++ b/tools/buildman/control.py
@@ -135,7 +135,7 @@
     global builder
 
     if options.full_help:
-        tools.PrintFullHelp(
+        tools.print_full_help(
             os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])), 'README')
         )
         return 0