[S] Change in coreboot[master]: mb/google/myst: Store XHCI PCI resources

[Jon Murphy (Code Review)]

Attention is currently required from: Eric Lai.

Jon Murphy has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74281 )

Change subject: mb/google/myst: Store XHCI PCI resources
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Patch Set 1:

(1 comment)

File src/mainboard/google/myst/mainboard.c:

https://review.coreboot.org/c/coreboot/+/74281/comment/3364c8b2_ba8abfe2 
PS1, Line 100: 	soc_xhci_store_resources(slots, size);
> Good question. […]

After looking at it further, my guess is that it was set up this way because most of the functionality lives in the x86 folder, but soc_xhci_store_resources is in the AMD code.  It may be worth looking into more, but I think for now I'd like to land it as is