USB: add reset endpoint operations

Wireless USB endpoint state has a sequence number and a current
window and not just a single toggle bit.  So allow HCDs to provide a
endpoint_reset method and call this or clear the software toggles as
required (after a clear halt, set configuration etc.).

usb_settoggle() and friends are then HCD internal and are moved into
core/hcd.h and all device drivers call usb_reset_endpoint() instead.

If the device endpoint state has been reset (with a clear halt) but
the host endpoint state has not then subsequent data transfers will
not complete. The device will only work again after it is reset or
disconnected.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/isdn/hisax/st5481_usb.c

@@ -149,14 +149,7 @@ static void usb_ctrl_complete(struct urb *urb)
 	if (ctrl_msg->dr.bRequest == USB_REQ_CLEAR_FEATURE) {
 	        /* Special case handling for pipe reset */
 		le16_to_cpus(&ctrl_msg->dr.wIndex);
-
-		/* toggle is reset on clear */
-		usb_settoggle(adapter->usb_dev, 
-			      ctrl_msg->dr.wIndex & ~USB_DIR_IN, 
-			      (ctrl_msg->dr.wIndex & USB_DIR_IN) == 0,
-			      0);
-
-
+		usb_reset_endpoint(adapter->usb_dev, ctrl_msg->dr.wIndex);
 	}
 	
 	if (ctrl_msg->complete)