[USBOHCI]

[USBOHCI]
- Add sanity checks
- Preserve  command status value when notifying the hc that a control / bulk endpoint was added
- Re-enable root hub notification interrupt when reset port has been completed
- Dispatch processing to USBQeueu when DoneHead event arrives
- Scan endpoints to find the logical endpoint which was completed by the hardware
- Signal completion to IUSBRequest by calling CompletionCallback
- Create a final transfer descriptor which is linked to the endpoint descriptor
- Control transfers now appear to be working (Device retrieves device descriptor / configuration descriptor and succeeds in setting device address)
- Configuration parsing code needs more work now (currently fails there due to invalid / unexpected configuration descriptor from device)

svn path=/branches/usb-bringup/; revision=51888