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

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Nico Huber, Subrata Banik, Maulik V Vaghela, Paul Menzel, Sridhar Siricilla, Arthur Heymans, Nick Vaccaro, Eric Lai, Felix Held.
Tim Wawrzynczak 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
......................................................................

Patch Set 6:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/63552/comment/4574ee5d_724c7817 
PS4, Line 37: SMI handler
> > > > > > Sorry, thinking error on my part. […]

This is intended to be a temporary workaround until we have a permanent solution/workaround from Intel. We suspect the permanent solution will end up in the ADL-P chipset blob collateral (i.e. not FSP), but don't know for sure yet, and this should be able to be reverted later.

_PTS may work, would have to test that there are no additional operations that happen after that runs to change the IP state again.