Change in coreboot[master]: nb/x4x/raminit: Rewrite SPD decode and timing selection

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Change subject: nb/x4x/raminit: Rewrite SPD decode and timing selection
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Patch Set 15: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/52994/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/8838/ : SUCCESS