[M] Change in coreboot[main]: doc/soc/intel/xeon_sp: Add Xeon-SP coreboot community preview guide

[Martin L Roth (Code Review)]

Attention is currently required from: Anjaneya "Reddy" Chagam, David Hendricks, Jonathan Zhang, Shuo Liu.

Martin L Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/78787?usp=email )

Change subject: doc/soc/intel/xeon_sp: Add Xeon-SP coreboot community preview guide
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Patch Set 7:

(1 comment)

File Documentation/soc/intel/xeon_sp/community_preview_guide.md:

https://review.coreboot.org/c/coreboot/+/78787/comment/60ac4691_2ea4ba09 :
PS5, Line 9: For Granite Rapids coreboot, we are going to perform a phased upstreaming strategy according to the maturity of the code.
           : A community preview branch is opensource at https://review.coreboot.org/plugins/gitiles/intel-dev-pub/.
           : 
           : The community preview branch initially contains codes on legacy feature enabling and matured patch set for platform support.
           : More platform support code will come with the platform development. The subsequent upstreaming work will be based on
           : this branch. It provides 2 board targets,
> Please break these (and other) long lines to fit within 96 columns [1]. […]

For documentation, the requested length is actually 72 characters.
https://doc.coreboot.org/getting_started/writing_documentation.html