staging: comedi: ni_atmio: 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/ni_atmio.c

@@ -336,7 +336,7 @@ static int ni_atmio_attach(struct comedi_device *dev,
 		return -EIO;
 
 	dev->board_ptr = ni_boards + board;
-	boardtype = comedi_board(dev);
+	boardtype = dev->board_ptr;
 	dev->board_name = boardtype->name;
 
 	/* irq stuff */