Instead of just defaulting to disabled, remove the option for
x86 since it doesn't work there.
Change-Id: I2b84b9f866f9231943e573b873c970f420c7c9a5
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14017
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
f2e0461d89