Add additional build config to test qemu-i440fx x86_64 code. Change-Id: I63f7a6e1602728e4d5ff67f9bd702efebe315c16 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31472 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>