Move __do_IRQ() definition to ia64 header file where it belongs.

Signed-off-by: Keir Fraser <keir@xensource.com>

xen/include/asm-ia64/linux/asm/irq.h

@@ -40,4 +40,6 @@ struct irqaction;
 struct pt_regs;
 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
 
+extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
+
 #endif /* _ASM_IA64_IRQ_H */

xen/include/xen/irq.h

@@ -71,6 +71,5 @@ struct vcpu;
 extern int pirq_guest_unmask(struct domain *p);
 extern int pirq_guest_bind(struct vcpu *p, int irq, int will_share);
 extern int pirq_guest_unbind(struct domain *p, int irq);
-extern  fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
 
 #endif /* __XEN_IRQ_H__ */