[XS] Change in coreboot[main]: soc/intel/mtl: Set HDA subsystem ID during FSP-M

[Tim Crawford (Code Review)]

Attention is currently required from: Dinesh Gehlot, Eran Mitrani, Jakub Czapiga, Kapil Porwal, Subrata Banik, Tarun.

Tim Crawford has posted comments on this change by Tim Crawford. ( https://review.coreboot.org/c/coreboot/+/82731?usp=email )

Change subject: soc/intel/mtl: Set HDA subsystem ID during FSP-M
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Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/82731/comment/b288d8a1_d1f8e7fa?usp... :
PS2, Line 7:  Set HDA subsystem ID during FSP-M
> Please check fill_fsps_pci_ssid_params(), I believe it solves the same purpose and it is still getti […]

We see no SSID reported in `lspci -s 0:1f.3 -vnn` without this change on Clevo L240TU and V5[46]0TU, so I assume it's already locked with a value of 0.

Setting this UPD causes SSID to show up in lspci.