[IA64] use generic_handle_irq()

Use generic_handle_irq() to handle mixed-type irq handling.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/irq.c

@@ -197,7 +197,7 @@ void fixup_irqs(void)
 			struct pt_regs *old_regs = set_irq_regs(NULL);
 
 			vectors_in_migration[irq]=0;
-			__do_IRQ(irq);
+			generic_handle_irq(irq);
 			set_irq_regs(old_regs);
 		}
 	}