staging: comedi: ni_pcidio: remove use of comedi_error()

The comedi_error() function is just a wrapper around dev_err() that adds
the dev->driver->driver_name prefix to the message and a terminating
new-line character. The addition of the driver_name is just added noise
and some of the users of comedi_error() add unnecessary additional new-line
characters.

Use dev_err() directly instead of comedi_error() to avoid any confusion
and so that all the comedi generated kernel messages have the same format.
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_pcidio.c

@@ -319,7 +319,7 @@ static int ni_pcidio_request_di_mite_channel(struct comedi_device *dev)
 					  devpriv->di_mite_ring, 1, 2);
 	if (devpriv->di_mite_chan == NULL) {
 		spin_unlock_irqrestore(&devpriv->mite_channel_lock, flags);
-		comedi_error(dev, "failed to reserve mite dma channel.");
+		dev_err(dev->class_dev, "failed to reserve mite dma channel\n");
 		return -EBUSY;
 	}
 	devpriv->di_mite_chan->dir = COMEDI_INPUT;