[PATCH] powerpc: unified signature of timer_interrupt() between ppc32/ppc64

On ppc64 timer_interrupt() returned a value that was never used.  Changed
the ppc64 version of timer_interrupt() to no longer return a value so
that the signatures between ppc32 & ppc64 match.  This will simplify
future merging of arch/powerpc.

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/include/asm-ppc64/hw_irq.h b/include/asm-ppc64/hw_irq.h
index baea40e..c483897 100644
--- a/include/asm-ppc64/hw_irq.h
+++ b/include/asm-ppc64/hw_irq.h
@@ -16,7 +16,7 @@
 #include <linux/errno.h>
 #include <asm/irq.h>
 
-int timer_interrupt(struct pt_regs *);
+extern void timer_interrupt(struct pt_regs *);
 extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
 
 #ifdef CONFIG_PPC_ISERIES