Revert "usb: add struct usb_hub_port to store port related members."

This reverts commit f397d7c4.

This series isn't quite ready for 3.5 just yet, so revert it and give
the author more time to get it correct.

Cc: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>