MAINTAINERS: Deal with '+' in paths

The listed paths are allowed to contain wildcards.  This includes the
'+' character which we have as a literal part of the path in a few
cases. Escape the '+' here so that files are matched.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
3 files changed