Public bug reported:

===SRU Justification===
[Impact]
USB controller stops working once a USB device gets plugged.

[Fix]
Add a delay for xHC can workaround the issue.

[Test]
Plug a USB device to affected system. USB controller stop working
afterward.
With the patch, the issue is solved.

[Regression Potential] 
Low. Trivial patch which adds a delay. No functional change.

** Affects: linux-oem (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1756700

Title:
  Ryzen/Raven Ridge USB ports do not work

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