[USBEHCI_NEW]

[USBEHCI_NEW]
hub_controller:
- Implement  StatusChangeEndpointCallBack called by HardwareDevice class when port status has changed on controller.
- Move Status Change Endpoint query code to IQueryStatusChageEndpoint as it is also needed by StatusChangeEndpointCallBack.
usb_request:
- Implement InternalCreateUsbRequest.
usb_queue:
- Implement  CreateUsbRequest and AddUsbRequest
hardware:
- Implement GetAsyncListRegister and GetPeriodicListRegister.
- Implement SetStatusChangeEndpointCallBack for setting callback and context. Call the callback when a port status changes.
- Initialize the UsbQueue after creating the AsyncQueueHead, as the UsbQueue calls will call back with GetAsyncListRegister.

svn path=/branches/usb-bringup/; revision=51407