Board identifiers use them without underscore, too. Unify that. Change-Id: I146384ef6dbe601ad131dada8224f43e6c18433d Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Reviewed-on: http://review.coreboot.org/674 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>