Found missing '$' symbol on variable. Change-Id: I748c315adc44598e16283f8e629be0ecfe9cb6a9 Signed-off-by: Damien Zammit <damien@zamaudio.com> Reviewed-on: http://review.coreboot.org/7514 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>