ntp: Convert simple_strtol to kstrtol

Replace obsolete function simple_strtol w/ kstrtol

Inspired-By: Andrew Morton <akpm@linux-foundation.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
[jstultz: Tweak commit message]
Signed-off-by: John Stultz <john.stultz@linaro.org>

kernel/time/ntp.c

@@ -923,7 +923,10 @@ void __hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
 
 static int __init ntp_tick_adj_setup(char *str)
 {
-	ntp_tick_adj = simple_strtol(str, NULL, 0);
+	int rc = kstrtol(str, 0, (long *)&ntp_tick_adj);
+
+	if (rc)
+		return rc;
 	ntp_tick_adj <<= NTP_SCALE_SHIFT;
 
 	return 1;