[IA64] Remove unlikely from cpu_is_offline

cpu_is_offline already uses unlikely internally.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

arch/ia64/kernel/time.c

@@ -168,7 +168,7 @@ timer_interrupt (int irq, void *dev_id)
 {
 	unsigned long new_itm;
 
-	if (unlikely(cpu_is_offline(smp_processor_id()))) {
+	if (cpu_is_offline(smp_processor_id())) {
 		return IRQ_HANDLED;
 	}