[PATCH] USB: fix ohci merge glitch

A patch re-organizing some parts of root hub initialization deleted the
code initializing the bus-neutral reboot/shutdown notifier for OHCI.
This patch just restores that deleted code.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>