[coreboot-gerrit] Change in coreboot[master]: mb/amd,google/mandolin,zork: Set EFS SPI platform config

[Matt Papageorge (Code Review)]

Matt Papageorge has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/43303 )

Change subject: mb/amd,google/mandolin,zork: Set EFS SPI platform config
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Patch Set 16:
> Patch Set 9:
>
> Please add to commit message that you have tested stoneyridge builds to not change.
>
> While stoneyridge selects SOC_AMD_COMMON_BLOCK_SPI it does not actually call fch_spi_early_init() and the Makefiles were not modified to fill EFS. Even though support for fam15h was added to util/amdfwtool.

I have refactored the change as follows.
1. Kconfig changes
2. Build changes for picasso platforms
3. Build changes for stoney ridge platforms

An optional future 4th change would be to address the duplicate definition of this information in
mainboard/google/kahlee/bootblock/bootblock.c
mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb
mainboard/google/zork/variants/baseboard/devicetree_trembyle.cb