Change in coreboot[master]: mb, soc: Add the SPD_CACHE_ENABLE

[Zhuohao Lee (Code Review)]

Attention is currently required from: Subrata Banik, Tim Wawrzynczak, Nick Vaccaro, Patrick Rudolph, Zhuohao Lee.
Zhuohao Lee has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62294 )

Change subject: mb, soc: Add the SPD_CACHE_ENABLE
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Patch Set 3:

(1 comment)

Patchset:

PS2:
> > Hi Subrata/Tim, […]
>
> True, we need to pass the FSPM_UPD structure rather soc config structure alone. if you have time constraint, please go with current approach and I will make it proper in coming days.

We're going to clean up the brask issue and we will need this CL before the end of the this week. Will you be able to make the change before that? If so, i think we can wait for it 😊