[L] Change in coreboot[main]: acpi: Add PPTT support

[David Milosevic (Code Review)]

Attention is currently required from: Arthur Heymans, Cliff Huang, Lance Zhao, Martin L Roth, Maximilian Brune, Nico Huber, Patrick Rudolph, Tim Wawrzynczak.

David Milosevic has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/78071?usp=email )

Change subject: acpi: Add PPTT support
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Patch Set 9:

(3 comments)

Patchset:

PS9:
> Kconfig LGTM. […]

will do

File src/acpi/acpi_pptt.c:

https://review.coreboot.org/c/coreboot/+/78071/comment/bc524039_a4260d28 :
PS8, Line 127: 	setup_topology(node->sibling, parent_ref, current);
> It's not only about understanding what the program is supposed to do but […]

You are right. I will replace the sibling recursion with the proposed loop :)

File src/include/acpi/acpi.h:

https://review.coreboot.org/c/coreboot/+/78071/comment/52e7e62f_8f08cf39 :
PS9, Line 1392: /* As defined in ACPI 6.4 */
> Not really a complaint about this patch, but maybe it's time to start looking at splitting up this h […]

Good suggestion. I would prefer having separate headers, but I think we should split it (along with all the other tables like hpet, ...) in another patch.