staging: comedi: ni_pcimio: convert printk() to dev_dbg()

Convert this printk messages to a dev_dbg().
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/ni_pcimio.c

@@ -1176,9 +1176,9 @@ static void m_series_stc_writew(struct comedi_device *dev, uint16_t data,
 		offset = M_Offset_AO_FIFO_Clear;
 		break;
 	case DIO_Control_Register:
-		printk
-		    ("%s: FIXME: register 0x%x does not map cleanly on to m-series boards.\n",
-		     __func__, reg);
+		dev_dbg(dev->class_dev,
+			"%s: FIXME: register 0x%x does not map cleanly on to m-series boards.\n",
+			__func__, reg);
 		return;
 		break;
 	case G_Autoincrement_Register(0):