[S] Change in coreboot[master]: soc/amd/phoenix/include/xhci: add USB4 XHCI device pointers

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Robert Zieba, Jason Glenesk, Matt DeVillier, Martin Roth, Fred Reitberger, Felix Held.

Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74658 )

Change subject: soc/amd/phoenix/include/xhci: add USB4 XHCI device pointers
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Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/74658/comment/7932ae92_a215475f 
PS2, Line 9: Beware that there's no XHCI2 controller and the USB4 controller device
           : pointers were added right after the xhci_0 and xhci_1 controller device
           : pointers.
> Maybe say why?  Should a similar comment be added to the source file? Nobody's going to look at the  […]

Definitely agree with Martin. I started looking into why it was not added to SOC_XHCI_3/4 similar to SMI/SCI map. Then later found that saving of XHCI PCI resources does not expect a hole in the list of XHCI devices. From that standpoint a comment is really helpful.