[usb/usbhub]

[usb/usbhub]
- WaitForUsbDeviceArrivalNotification: Dont use IoBuildDeviceIoControlRequest to create the IRP as we dont wait for the IRP to complete in the current thread. It must be built using IoAllocateIrp.
- DeviceArrivalCompletion: Allocate the WorkItem from NonPagedPool vice using one in the DeviceExtension. Free the Irp and return STATUS_MORE_PROCESSING_REQUIRED so the IO Manager doesnt try to do anything more with the now freed Irp.
- When selecting the Interface use the routines in USBD library now that they are implemented correctly.
- More fixes for passing the correct DeviceObject when calling QueryRootHub.

svn path=/trunk/; revision=48826