hrtimers: Fix typo causing erratic timers

commit 9ec26907 ("timerfd: Manage cancelable timers in timerfd")
introduced a CONFIG_HIGHRES_TIMERS (should be CONFIG_HIGH_RES_TIMERS)
typo, which caused applications depending on CLOCK_REALTIME timers to
become sluggy due to the fact that the time base of the realtime
timers was not updated when the wall clock time was set.

This causes anything from 100% CPU use for some applications to odd
delays and hickups.
Reported-bisected-and-tested-by: NAnca Emanuel <anca.emanuel@gmail.com>
Tested-by: NLinus Torvalds <torvalds@linux-foundation.org>
Fatfingered-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

kernel/hrtimer.c

@@ -748,7 +748,7 @@ static inline void retrigger_next_event(void *arg) { }
  */
 void clock_was_set(void)
 {
-#ifdef CONFIG_HIGHRES_TIMERS
+#ifdef CONFIG_HIGH_RES_TIMERS
 	/* Retrigger the CPU local events everywhere */
 	on_each_cpu(retrigger_next_event, NULL, 1);
 #endif