These variant-specific options are only selected by their board options
and are not used for anything else. Thus, merge their selects into the
board options and drop them.
Change-Id: I0eb3fdc4fd7306e76d5479494e3ab80bbdb984fe
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60189
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>