[M] Change in coreboot[master]: soc/intel/xeon_sp: Read ioapic configuration from hardware

[Jonathan Zhang (Code Review)]

Attention is currently required from: Johnny Lin, Christian Walter, Arthur Heymans, Kyösti Mälkki, Tim Chu.

Jonathan Zhang has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/70265 )

Change subject: soc/intel/xeon_sp: Read ioapic configuration from hardware
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Patch Set 9: Code-Review+2

(1 comment)

Patchset:

PS9: 
Hi Arthur, I suppose you tested this on DeltaLake? I did a sanity test on CraterLake with our rebase code base, looks fine to me.