x86: change __setup_vector_irq with setup_vector_irq

We create a version of it for i386, and then take the CONFIG_X86_64
ifdef out of the game. We could create a __setup_vector_irq for i386,
but it would incur in an unnecessary lock taking. Moreover, it is better
practice to only export setup_vector_irq anyway.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/hw_irq.h b/include/asm-x86/hw_irq.h
index 1428b41..18f067c 100644
--- a/include/asm-x86/hw_irq.h
+++ b/include/asm-x86/hw_irq.h
@@ -97,9 +97,9 @@
 #else
 typedef int vector_irq_t[NR_VECTORS];
 DECLARE_PER_CPU(vector_irq_t, vector_irq);
-extern void __setup_vector_irq(int cpu);
 extern spinlock_t vector_lock;
 #endif
+extern void setup_vector_irq(int cpu);
 
 #endif /* !ASSEMBLY_ */