staging: comedi: 8255: remove have_irg and refactor subdev_8255_init_irq

The have_irq variable in the 8255 private data is not used by the driver,
remove it.  This removes the need to access the private data in the
subdev_8255_init_irq function.

Also, add a bit of whitespace to improve the readability.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/8255.c

@@ -100,7 +100,6 @@ I/O port base address can be found in the output of 'lspci -v'.
 struct subdev_8255_private {
 	unsigned long iobase;
 	int (*io) (int, int, int, unsigned long);
-	int have_irq;
 };
 
 void subdev_8255_interrupt(struct comedi_device *dev,
@@ -340,15 +339,11 @@ int subdev_8255_init_irq(struct comedi_device *dev, struct comedi_subdevice *s,
 			 int (*io) (int, int, int, unsigned long),
 			 unsigned long iobase)
 {
-	struct subdev_8255_private *spriv;
 	int ret;
 
 	ret = subdev_8255_init(dev, s, io, iobase);
 	if (ret < 0)
 		return ret;
-	spriv = s->private;
-
-	spriv->have_irq = 1;
 
 	s->do_cmdtest	= subdev_8255_cmdtest;
 	s->do_cmd	= subdev_8255_cmd;