Change in coreboot[master]: [WIP] src/drivers/intel/fsp2_0: Add FSP 2.3 support

[Anil Kumar K (Code Review)]

Attention is currently required from: Paul Menzel, Subrata Banik, Andrey Petrov, Patrick Rudolph.
Anil Kumar K has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59324 )

Change subject: [WIP] src/drivers/intel/fsp2_0: Add FSP 2.3 support
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Patch Set 11:

(1 comment)

Patchset:

PS11:
> A message to the mailing list would be great, what changed between FSP 2.2 and 2.3.

Sure. here are the details. I have added these in Kconfig as well

Features added into FSP 2.3 specification that impact coreboot are:
      1. FSP_INFO_HEADER changes
        Updated SpecVersion from 0x22 to 0x23
        Updated HeaderRevision from 5 to 6
        Added ExtendedImageRevision
        FSP_INFO_HEADER length changed to 0x50
      2. Added FSP_NON_VOLATILE_STORAGE_HOB2
            New HOB introduced to take care of data size limitation in previous 
            HOB