... and always include IP checksumming in romstage.
It's generally useful and our upcoming port needs it.
Change-Id: I248402d96a23e58354744e053b9d5cca6b74ad3a
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/827
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>