USB: omap_udc build fixes (sync with linux-omap)

Resync the omap_udc driver with the latest from the Linux-OMAP tree.
Changes include DMA API updates (it builds again!), clock/pm updates,
minor bugfixes, whitespace.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/omap_udc.h

@@ -175,6 +175,9 @@ struct omap_udc {
 	unsigned			ep0_reset_config:1;
 	unsigned			ep0_setup:1;
 	struct completion		*done;
+	struct clk			*dc_clk;
+	struct clk			*hhc_clk;
+	unsigned			clk_requested:1;
 };
 
 /*-------------------------------------------------------------------------*/