This patch implements the Windows scheme for USB device initialization.
It also incorporates the change recently posted by David to scrub the
endpoint state following a SET-ADDRESS.  Other noteworthy changes:

	There are two new module parameters to control whether the
	old scheme or the new one is used first and whether the other
	scheme is tried if the first one fails.  Default settings are
	to use the new scheme only.

	hub_set_address() returns 0 immediately if the device is already
	in the USB_STATE_ADDRESS state.

	On the first attempt to read the device descriptor the code
	uses a short 1-second timeout.  This ought to help prevent
	full-speed devices with an 8- or 16-byte maxpacket from
	slowing the procedure down by NAKing the unexpectedly early
	status stage of the transfer.

	For debugging, the ep0 maxpacket value is printed.  It might
	be a good idea to validate it rather than just believing the
	device -- although I haven't heard of any device providing
	an incorrect value other than 0.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>