time: Fix spelling mistake in comment

witin => within

Signed-off-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1571124819-9639-1-git-send-email-mojha@codeaurora.org

diff --git a/kernel/time/time.c b/kernel/time/time.c
index 45a3589..ea6e7e4 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -179,7 +179,7 @@ int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz
 		return error;
 
 	if (tz) {
-		/* Verify we're witin the +-15 hrs range */
+		/* Verify we're within the +-15 hrs range */
 		if (tz->tz_minuteswest > 15*60 || tz->tz_minuteswest < -15*60)
 			return -EINVAL;