[IA64] smpboot.c: use msleep(100) instead of inlined equivalent

Use msleep() instead of schedule_timeout() to guarantee the task
delays as expected.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/smpboot.c

@@ -612,8 +612,7 @@ void __cpu_die(unsigned int cpu)
 			 */
 			return;
 		}
-		current->state = TASK_UNINTERRUPTIBLE;
-		schedule_timeout(HZ/10);
+		msleep(100);
 	}
  	printk(KERN_ERR "CPU %u didn't die...\n", cpu);
 }