Titan Ridge xHCI may stop to working after re-plugging the dock

[Kai-Heng Feng]

Hi Mika and Mathias,

I’ve filed a bug [1] which renders docking station unusable.
I am not sure it's a bug in PCI, Thunderbolt or xHCI so raise the issue to  
you both.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=203885

Kai-Heng