[M] Change in coreboot[master]: post_codes: Add an optional "Prefix" to post codes sent to IO

[Martin L Roth (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Matt DeVillier, Martin Roth, Fred Reitberger, Felix Held.

Martin L Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/71712 )

Change subject: post_codes: Add an optional "Prefix" to post codes sent to IO
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Patch Set 1:

(1 comment)

Patchset:

PS1:
> wouldn't be adding 4 bit post code support to coreboot and then adding a coreboot-specific prefix in […]

Yeah, that's a future patch.  Currently the Skyrim EC only decodes 8-bit postcodes though, so I needed something to prefix those and let me differentiate the coreboot codes from PSP/SMU/FSP codes.

On friday, I was able to patch the EC to print 32-bit postcodes, so I'll be adding 32-bit postcode support shortly.