Disabled USB ports after suspend/resume

[Brandon Gooch]

I've been using Jung-uk Kim's suspend patches for amd64 since before
the new USB stack:

http://people.freebsd.org/~jkim/amd64_suspend.diff

Now when I suspend and resume, I lose USB ports.

>From dmesg:

ugen0.2: <STMicroelectronics> at usbus0 (disconnected)
stray irq0
usbus2: port reset timeout
uhub_reattach_port:348: port 2 reset failed, error=USB_ERR_TIMEOUT
uhub_reattach_port:434: device problem (USB_ERR_TIMEOUT), disabling port 2

I'm at svn rev. 188909.