Change in coreboot[master]: mb/google/brya: Reset XHCI controller while preparing for S5

[Arthur Heymans (Code Review)]

Attention is currently required from: Subrata Banik, Maulik V Vaghela, Paul Menzel, Sridhar Siricilla, Nick Vaccaro, Eric Lai, Felix Held.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63552 )

Change subject: mb/google/brya: Reset XHCI controller while preparing for S5
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Patch Set 6:

(1 comment)

Patchset:

PS6: 
Can the reset be just called on the resume from S5 path instead of in the smihandler before entering S5?