x86: irqinit_64.c init_ISA_irqs should be static

Signed-off-by: Jaswinder Singh <jaswinder@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index cb875a6..da481a1 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -81,7 +81,7 @@
 	return 0;
 }
 
-void __init init_ISA_irqs(void)
+static void __init init_ISA_irqs(void)
 {
 	int i;