genirq: Make create/destroy_irq() ia64 private

No more users outside of itanic. Confine it.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NGrant Likely <grant.likely@linaro.org>
Tested-by: NTony Luck <tony.luck@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/20140507154338.700598389@linutronix.deSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/ia64/include/asm/irq.h

@@ -31,4 +31,7 @@ bool is_affinity_mask_valid(const struct cpumask *cpumask);
 
 #define is_affinity_mask_valid is_affinity_mask_valid
 
+int create_irq(void);
+void destroy_irq(unsigned int irq);
+
 #endif /* _ASM_IA64_IRQ_H */

include/linux/irq.h

@@ -525,10 +525,6 @@ static inline void irq_set_percpu_devid_flags(unsigned int irq)
 			     IRQ_NOPROBE | IRQ_PER_CPU_DEVID);
 }
 
-/* Handle dynamic irq creation and destruction */
-extern int create_irq(void);
-extern void destroy_irq(unsigned int irq);
-
 /*
  * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and
  * irq_free_desc instead.