sched/deadline: Fix typo in a comment

In the comment:

        /*
         * The task might have changed its scheduling policy to something
         * different than SCHED_DEADLINE (through switched_fromd_dl()).
         */

s/fromd/from/

Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luca Abeni <luca.abeni@unitn.it>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/5408b3b3f9ee197a7b7f10fb834341100a4f2c88.1478599881.git.bristot@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

kernel/sched/deadline.c

@@ -586,7 +586,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer)
 
 	/*
 	 * The task might have changed its scheduling policy to something
-	 * different than SCHED_DEADLINE (through switched_fromd_dl()).
+	 * different than SCHED_DEADLINE (through switched_from_dl()).
 	 */
 	if (!dl_task(p)) {
 		__dl_clear_params(p);