[PATCH] USB: add support for OCHI on AT91rm9200

This adds support for OHCI on AT91rm9200 based boards.

Possibly of interest here is the way this uses <linux/clk.h> to
gate clocks on/off during system pm state transitions.  That's
typical for non-PCI systems.  Some can go further; Mini-A host
side connectors enable ID-pin sensing.

From: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>