[L] Change in coreboot[master]: mb/intel: add Archer City CRB support

[Lean Sheng Tan (Code Review)]

Attention is currently required from: Patrick Rudolph, Simon Chou, Johnny Lin, Paul Menzel, Shuming Chu (Shuming), Arthur Heymans, Juan Sanchez.

Lean Sheng Tan has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/71968 )

Change subject: mb/intel: add Archer City CRB support
......................................................................

Patch Set 28:

(1 comment)

File src/mainboard/intel/archercity_crb/romstage.c:

https://review.coreboot.org/c/coreboot/+/71968/comment/3d931d4b_e4af7bc9 
PS27, Line 83: 		mupd->FspmConfig.DelayAfterPCIeLinkTraining = 2000;
> I meant remove the redundant comment, and just put the unit as a comment on the same line.

hi Paul do you have any example as reference? or where is this documented in guideline? thanks.