Taken from CrOS, including everything up to commit da4c33913.
Adapted to upstream.
Change-Id: I095e6726a220200ba17719fc05fcdc521da484e8
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10432
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
