[PATCH] gcc-3.5 io_apic.c build fix

From: Valdis.Kletnieks@vt.edu

The send_IPI_self() in smp.c was fixed but the one in io_apic.c was not.

arch/i386/kernel/io_apic.c

@@ -694,7 +694,7 @@ static inline void move_irq(int irq) { }
 #endif /* CONFIG_IRQBALANCE */
 
 #ifndef CONFIG_SMP
-void send_IPI_self(int vector)
+void fastcall send_IPI_self(int vector)
 {
 	unsigned int cfg;