[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/net/hamradio/baycom_par.c b/drivers/net/hamradio/baycom_par.c
index 5930aeb..2e6fc4d 100644
--- a/drivers/net/hamradio/baycom_par.c
+++ b/drivers/net/hamradio/baycom_par.c
@@ -270,9 +270,9 @@
 
 /* --------------------------------------------------------------------- */
 
-static void par96_interrupt(int irq, void *dev_id)
+static void par96_interrupt(void *dev_id)
 {
-	struct net_device *dev = (struct net_device *)dev_id;
+	struct net_device *dev = dev_id;
 	struct baycom_state *bc = netdev_priv(dev);
 
 	baycom_int_freq(bc);