[ISDN] minor irq handler cleanups

- reference irq number in CardState structure

- remove now-unused 'intno' argument from rs_interrupt_elsa()

- cs->irq_func() should be defined using standard irq_handler_t

- add KERN_DEBUG to printk() where appropriate

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/isdn/hisax/hisax.h b/drivers/isdn/hisax/hisax.h
index 34733c9..e8d429f 100644
--- a/drivers/isdn/hisax/hisax.h
+++ b/drivers/isdn/hisax/hisax.h
@@ -925,7 +925,7 @@
 	int		(*cardmsg) (struct IsdnCardState *, int, void *);
 	void		(*setstack_d) (struct PStack *, struct IsdnCardState *);
 	void		(*DC_Close) (struct IsdnCardState *);
-	int		(*irq_func) (int, void *);
+	irq_handler_t	irq_func;
 	int		(*auxcmd) (struct IsdnCardState *, isdn_ctrl *);
 	struct Channel	channel[2+MAX_WAITING_CALLS];
 	struct BCState	bcs[2+MAX_WAITING_CALLS];