VBOOT_DYNAMIC_WORK_BUFFER and VBOOT_STARTS_IN_ROMSTAGE are equivalent in
practice. We can't have a dynamic work buffer unless we start in/after
romstage, and there'd be no reason to go with a static buffer if we do.
Let's get rid of one extra option and merge the two.
Change-Id: I3f953c8d2a8dcb3f65b07f548184d6dd0eb688fe
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/18979
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>