This section of the settings file may be missing. Handle that gracefully
rather than emitting an error.
Also update patman to write this section when a new settings file is
created.
Fixes: e11aa602 (patman: add support for omitting bouncing addresses)
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Chris Packham <judge.pckham@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>