Otherwise there may be a filesystem boundary that breaks make oldconfig.
Change-Id: I1eb55bcabc3e1b834d54f3da9fadfc352f0c4a65
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/11150
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>