[XL] Change in coreboot[master]: soc/intel/xeon_sp: Rename nb_acpi.c and add SPR-SP support

[Jonathan Zhang (Code Review)]

Attention is currently required from: Patrick Rudolph, Simon Chou, TimLiu-SMCI, Johnny Lin, Christian Walter, Angel Pons, Arthur Heymans, Jian-Ming Wang, Tim Chu, Shelly Chang.

Jonathan Zhang has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/71958 )

Change subject: soc/intel/xeon_sp: Rename nb_acpi.c and add SPR-SP support
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Patch Set 8:

(2 comments)

Patchset:

PS8: 
The diff between the original nb_acpi.c and the new uncore_acpi.c is not shown. I wonder if we did "git mv"?

File src/soc/intel/xeon_sp/uncore_acpi.c:

https://review.coreboot.org/c/coreboot/+/71958/comment/f1fb46f4_e9a218ba 
PS2, Line 147: pds.
> Where does it come from?

pds is short for Proximity Domains. It is needed for CXL capable system, where proximity domains include both (traditional) processor domains and CXL domains.
pds is a global variable, defined in uncore.c .