[M] Change in coreboot[main]: soc/intel/xeon_sp/lbg: Add support to hide HDA

[Patrick Rudolph (Code Review)]

Attention is currently required from: Angel Pons, Christian Walter, Johnny Lin, Jonathan Zhang, Paul Menzel, Tim Chu, [e-mail].

Patrick Rudolph has posted comments on this change by Patrick Rudolph. ( https://review.coreboot.org/c/coreboot/+/85496?usp=email )

Change subject: soc/intel/xeon_sp/lbg: Add support to hide HDA
......................................................................

Patch Set 4:

(1 comment)

File src/soc/intel/xeon_sp/cpx/romstage.c:

https://review.coreboot.org/c/coreboot/+/85496/comment/8ea2dbb4_6eb52874?usp... :
PS4, Line 113: 	if (!is_devfn_enabled(PCH_DEVFN_HDA))
> Would it make sense to have a PCI driver for this instead? […]

It should be hidden before FSP-M runs, to prevent it from detecting a working HDA PCI device.