time: fix bogus comment in timekeeping_get_ns_raw

The whole point of this function is to return a value not touched by
NTP; unfortunately the comment got copied wholesale without adjustment
from the timekeeping_get_ns function above.
Signed-off-by: Dan McGee <dpmcgee@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>

kernel/time/timekeeping.c

@@ -131,7 +131,7 @@ static inline s64 timekeeping_get_ns_raw(void)
 	/* calculate the delta since the last update_wall_time: */
 	cycle_delta = (cycle_now - clock->cycle_last) & clock->mask;
 
-	/* return delta convert to nanoseconds using ntp adjusted mult. */
+	/* return delta convert to nanoseconds. */
 	return clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift);
 }