staging: comedi: usbduxfast: convert pr_warn() to dev_warn()

Use dev_warn() to output the warning message.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/ni_pcimio.c

@@ -1183,7 +1183,7 @@ static int pcimio_auto_attach(struct comedi_device *dev,
 
 	ret = mite_setup(devpriv->mite);
 	if (ret < 0) {
-		pr_warn("error setting up mite\n");
+		dev_warn(dev->class_dev, "error setting up mite\n");
 		return ret;
 	}