We don't support them, they won't ever pass the build test,
so no need to report an error.
Change-Id: I2409a79f3c0d66a79b0e065e6b9ebf62d0359b3e
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/7121
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>