staging: comedi: amplc_dio200: remove unnecessary local variable

The local variable 'irq' is not necessary in dio200_attach(). Just
pass the it->options[1] value directly.
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/amplc_dio200.c

@@ -254,16 +254,13 @@ static const struct dio200_board dio200_isa_boards[] = {
 
 static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 {
-	unsigned int irq;
 	int ret;
 
-	irq = it->options[1];
-
 	ret = comedi_request_region(dev, it->options[0], 0x20);
 	if (ret)
 		return ret;
 
-	return amplc_dio200_common_attach(dev, irq, 0);
+	return amplc_dio200_common_attach(dev, it->options[1], 0);
 }
 
 static void dio200_detach(struct comedi_device *dev)