[L] Change in coreboot[main]: soc/xeon_sp: Initially add N-1 IBL codes

[Shuo Liu (Code Review)]

Attention is currently required from: Arthur Heymans, Christian Walter, David Hendricks, Johnny Lin, Jonathan Zhang, Lean Sheng Tan, Patrick Rudolph, TangYiwei, Tim Chu.

Shuo Liu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81315?usp=email )

Change subject: soc/xeon_sp: Initially add N-1 IBL codes
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Patch Set 11:

(1 comment)

Patchset:

PS11:
> There's no need to add tons of code that won't ever be used since the HW for it just doesn't exist o […]

Reasonable. Abandon this one.