[L] Change in coreboot[master]: soc/intel/xeon_sp: Add uncore_acpi.c for spr

[Jonathan Zhang (Code Review)]

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

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

Change subject: soc/intel/xeon_sp: Add uncore_acpi.c for spr
......................................................................

Patch Set 3:

(1 comment)

Patchset:

PS2:
> This code is more similar to nb_acpi.c than there are differences. […]

With newer xeon_sp processors, the concept of "north bridge" became obsolete, instead uncore should be used. Therefore we use uncore_acpi.c (instead of nb_acpi.c) going forward. We chose to use a new file to avoid having to carry bags.