nb/intel/x4x: Adapt post JEDEC for DDR3

Change-Id: I708f98dc2f36af73bb5933d186b4984649e149a1
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/19918
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
3 files changed