staging: comedi: pcl724: replace comedi_board() calls

The `comedi_board(dev)` inline function calls just return
`dev->board_ptr`.  Expand the inline function calls.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/pcl724.c

@@ -98,7 +98,7 @@ static int pcl724_8255mapped_io(struct comedi_device *dev,
 static int pcl724_attach(struct comedi_device *dev,
 			 struct comedi_devconfig *it)
 {
-	const struct pcl724_board *board = comedi_board(dev);
+	const struct pcl724_board *board = dev->board_ptr;
 	struct comedi_subdevice *s;
 	unsigned long iobase;
 	unsigned int iorange;