time: Delete do_sys_setimeofday()

struct timespec is not y2038 safe on 32 bit machines and needs to be
replaced with struct timespec64.

do_sys_timeofday() is just a wrapper function.  Replace all calls to this
function with direct calls to do_sys_timeofday64() instead and delete
do_sys_timeofday().

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: y2038@lists.linaro.org
Cc: john.stultz@linaro.org
Cc: arnd@arndb.de
Cc: linux-alpha@vger.kernel.org
Link: http://lkml.kernel.org/r/1490555058-4603-2-git-send-email-deepa.kernel@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c
index cd6716e..95a1b1fc 100644
--- a/kernel/time/posix-stubs.c
+++ b/kernel/time/posix-stubs.c
@@ -49,13 +49,16 @@ SYS_NI(alarm);
 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
 		const struct timespec __user *, tp)
 {
+	struct timespec64 new_tp64;
 	struct timespec new_tp;
 
 	if (which_clock != CLOCK_REALTIME)
 		return -EINVAL;
 	if (copy_from_user(&new_tp, tp, sizeof (*tp)))
 		return -EFAULT;
-	return do_sys_settimeofday(&new_tp, NULL);
+
+	new_tp64 = timespec_to_timespec64(new_tp);
+	return do_sys_settimeofday64(&new_tp64, NULL);
 }
 
 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,