staging: comedi: pcmuio: return 0 for successful attach

Returning 0 for success is more common.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: NIan Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/pcmuio.c

@@ -672,7 +672,7 @@ static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 		devpriv->asics[asic].irq = irq[asic];
 	}
 
-	return 1;
+	return 0;
 }
 
 static void pcmuio_detach(struct comedi_device *dev)