[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>

sound/drivers/portman2x4.c

@@ -611,7 +611,7 @@ static int __devinit snd_portman_rawmidi_create(struct snd_card *card)
 /*********************************************************************
  * parport stuff
  *********************************************************************/
-static void snd_portman_interrupt(int irq, void *userdata)
+static void snd_portman_interrupt(void *userdata)
 {
 	unsigned char midivalue = 0;
 	struct portman *pm = ((struct snd_card*)userdata)->private_data;