README: replace references to CHANGELOG

Board configurations are in configs/ and not in the Makefile.

git log is the adequate way to identify who contributed to our source.
scripts/get_maintainer.pl is the correct way to identify maintainers.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed