This patch moves usb_new_device(), usb_disconnect(), usb_choose_address(),
and usb_release_address() from usb.c to hub.c.  As a side benefit,
choose_address() and release_address() can now become static.  The other
two can't, because they have to be exported for use by HCD's when
registering/unregistering root hubs.

Some other features of the patch:

	The usb_snddefctrl() and usb_rcvdefctrl() macros have been
	removed, since only one of them was used and only in one spot.

	The comment about configuration choice needing to interact with
	hub power budgeting has been moved in accordance with David's
	wish.  usb_new_device() checks to make sure a configuration
	could be chosen and logs a warning if no choice was made.

	Following Linus's preference, the #ifdef preprocessor stuff has
	been removed from around the calls the show_string routine.  It
	is now defined as a non-inline routine when debugging is enabled
	and as an inline no-op otherwise (the compiler will optimize
	away the useless tests).
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>