USB: Fix goku_udc usb speed handling

The usb gadget framework revealed weakness in the godu_udc
gadget driver register function. Instead of checking if
speed asked for was USB_LOW_SPEED upon usb_gadget_register()
to deny service, it checked only for USB_FULL_SPEED, thus
denying service to usb high speed capable gadgets.

Signed-off-by: SangSu Park <[e-mail]>
Acked-by: David Brownell <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/gadget/goku_udc.c

···
 	int			retval;
 
 	if (!driver
-			|| driver->speed != USB_SPEED_FULL
+			|| driver->speed < USB_SPEED_FULL
 			|| !driver->bind
 			|| !driver->disconnect
 			|| !driver->setup)