softlockup: s/99/MAX_RT_PRIO/

Don't use hardcoded 99 value, use MAX_RT_PRIO.

Signed-off-by: Oleg Nesterov <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

kernel/softlockup.c

···
  */
 static int watchdog(void * __bind_cpu)
 {
-	struct sched_param param = { .sched_priority = 99 };
+	struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
 
 	sched_setscheduler(current, SCHED_FIFO, &param);
 	current->flags |= PF_NOFREEZE;