staging: comedi: ni_labpc_isadma: 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_labpc_isadma.c

@@ -152,7 +152,7 @@ static void handle_isa_dma(struct comedi_device *dev)
 
 void labpc_handle_dma_status(struct comedi_device *dev)
 {
-	const struct labpc_boardinfo *board = comedi_board(dev);
+	const struct labpc_boardinfo *board = dev->board_ptr;
 	struct labpc_private *devpriv = dev->private;
 
 	/*