Here is the resend of the patch to support compatible URB ioctl
on 64 bit systems. This version already incorporate some feed back
I get from the list and I have not get any new input yet.

Change Log:
- Let usbdevfs directly handle 32 bit URB ioctl. More specifically:
  USBDEVFS_SUBMITURB32, USBDEVFS_REAPURB32 and USBDEVFS_REAPURBNDELAY32.
  Those asynchronous ioctls are too complicate to handle by the
  compatible layer.

Thanks

Chris