sched: Use pr_fmt() and pr_<level>()

- Convert printk(KERN_<level> to pr_<level> (not KERN_DEBUG)
 - Add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 - Coalesce long format strings
 - Add missing \n to "ERROR: !SD_LOAD_BALANCE domain has parent"

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1260655047.2637.7.camel@Joe-Laptop.home>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/sched_idletask.c

@@ -35,7 +35,7 @@ static void
 dequeue_task_idle(struct rq *rq, struct task_struct *p, int sleep)
 {
 	spin_unlock_irq(&rq->lock);
-	printk(KERN_ERR "bad: scheduling from the idle thread!\n");
+	pr_err("bad: scheduling from the idle thread!\n");
 	dump_stack();
 	spin_lock_irq(&rq->lock);
 }