Fix root hub descriptors by matching ehci(4)'s descriptors.
Fix root hub descriptors by matching ehci(4)'s descriptors.

Reminded by mpi@, thanks!

On a side note usb sticks don't get fried anymore, they "just"
freeze the system.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars