ia64: Use generic show_interrupts()

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index fcf3b43..c4ea092 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -26,6 +26,7 @@
 	select GENERIC_IRQ_PROBE
 	select GENERIC_PENDING_IRQ if SMP
 	select IRQ_PER_CPU
+	select GENERIC_IRQ_SHOW
 	default y
 	help
 	  The Itanium Processor Family is Intel's 64-bit successor to