USB: musb_gadget: implement set_wedge() method

Implement the driver's set_wedge() method by adding the 'wedged' flag
to the 'struct musb_ep'.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/musb/musb_gadget.h b/drivers/usb/musb/musb_gadget.h
index 59502da..9096669 100644
--- a/drivers/usb/musb/musb_gadget.h
+++ b/drivers/usb/musb/musb_gadget.h
@@ -75,6 +75,8 @@
 	/* later things are modified based on usage */
 	struct list_head		req_list;
 
+	u8				wedged;
+
 	/* true if lock must be dropped but req_list may not be advanced */
 	u8				busy;
 };