[coreboot-gerrit] Change in coreboot[master]: [DO NOT MERGE] {soc,mb}/intel/dehydratedlake: Add empty SoC/mainboard

[Angel Pons (Code Review)]

Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/45670 )

Change subject: [DO NOT MERGE] {soc,mb}/intel/dehydratedlake: Add empty SoC/mainboard
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Patch Set 1: Code-Review-2

Do not submit. This is an attempt to use as little code as possible to make a buildable SoC/mainboard. It can be slimmed down even further, but I think it's already pretty good.