staging: comedi: amplc_dio_common: 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/amplc_dio200_common.c

@@ -327,7 +327,7 @@ static void dio200_read_scan_intr(struct comedi_device *dev,
 		/* Error!  Stop acquisition.  */
 		dio200_stop_intr(dev, s);
 		s->async->events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW;
-		comedi_error(dev, "buffer overflow");
+		dev_err(dev->class_dev, "buffer overflow\n");
 	}
 
 	/* Check for end of acquisition. */