x86: make init_ISA_irqs nonstatic

Signed-off-by: NGlauber Costa <gcosta@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/irqinit_64.c

@@ -135,7 +135,7 @@ DEFINE_PER_CPU(vector_irq_t, vector_irq) = {
 	[IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
 };
 
-static void __init init_ISA_irqs (void)
+void __init init_ISA_irqs(void)
 {
 	int i;