buildman: Handle the MAINTAINERS 'N' tag

This is needed for some soon-to-be-applied patches. Scan the configs/
directory to see if any of the files match.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Tom Rini <trini@konsulko.com>
Suggested-by: Tom Rini <trini@konsulko.com>
1 file changed