[coreboot-gerrit] Change in coreboot[master]: soc/amd/common/biosram: Add functions to get/set bootram used

[Marshall Dawson (Code Review)]

Marshall Dawson has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/38701 )

Change subject: soc/amd/common/biosram: Add functions to get/set bootram used
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Patch Set 4:
> Patch Set 4:
>
> What is the motivation to consume non-volatile 8-bit accessible biosram registers here instead of DRAM and migrate these to CBMEM? You need persistent .earlyram.data anyways implemented across early stages.

Adding a small section in .earlyram.data seems acceptable.  We'll need to copy that to cbmem in romstage, then use the info stored in cbmem during ramstage.