USB: wusbcore: add HWA-specific fields to usb_rpipe_descriptor

This patch adds the HWA specific members to struct usb_rpipe_descriptor
and sets them correctly based on the wireless endpoint compananion
descriptor.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>