soc/intel/skylake: Drop FSP_CAR options
It's not implemented for Skylake, all combinations that try to enable it
either result in Kconfig or linker errors.
Move `config SKIP_FSP_CAR` into drivers/intel/fsp1_1 where it's
effective.
TEST=Built Intel/Kunimitsu (FSP1.1) and Intel/KBLRVP8 (FSP2.0) default
configs with and without this patch: binaries stay the same.
Change-Id: Iae0a2d2c7fd7a71ed24118564e6080c4789cda28
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/29533
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>