staging: comedi: gsc_hpdi: convert comedi_error() messages to dev_err()

For aesthetics, convert the comedi_error() messages to dev_err().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/gsc_hpdi.c

@@ -263,12 +263,12 @@ static irqreturn_t gsc_hpdi_interrupt(int irq, void *d)
 	}
 
 	if (hpdi_board_status & RX_OVERRUN_BIT) {
-		comedi_error(dev, "rx fifo overrun");
+		dev_err(dev->class_dev, "rx fifo overrun\n");
 		async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
 	}
 
 	if (hpdi_board_status & RX_UNDERRUN_BIT) {
-		comedi_error(dev, "rx fifo underrun");
+		dev_err(dev->class_dev, "rx fifo underrun\n");
 		async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
 	}