"ep->udc->lock" and "udc->lock" are the same thing.  It confuses Smatch
if we don't use the same name consistently.
Reviewed-by: NSören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>