[PARPORT] Remove unused 'irq' argument from parport irq functions

None of the drivers with a struct pardevice's ->irq_func() hook ever
used the 'irq' argument passed to it, so remove it.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/input/serio/parkbd.c b/drivers/input/serio/parkbd.c
index 688610e..b089977 100644
--- a/drivers/input/serio/parkbd.c
+++ b/drivers/input/serio/parkbd.c
@@ -102,7 +102,7 @@
 	return 0;
 }
 
-static void parkbd_interrupt(int irq, void *dev_id)
+static void parkbd_interrupt(void *dev_id)
 {
 
 	if (parkbd_writing) {