netfilter: xt_time: fix time's time_mt()'s use of do_div()

Fix netfilter xt_time's time_mt()'s use of do_div() on an s64 by using
div_s64() instead.

This was introduced by patch ee4411a1b1e0b679c99686629b5eab5a072ce49f
("[NETFILTER]: x_tables: add xt_time match").

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/xt_time.c b/net/netfilter/xt_time.c
index ed76baa..9f32859 100644
--- a/net/netfilter/xt_time.c
+++ b/net/netfilter/xt_time.c
@@ -173,7 +173,7 @@
 		__net_timestamp((struct sk_buff *)skb);
 
 	stamp = ktime_to_ns(skb->tstamp);
-	do_div(stamp, NSEC_PER_SEC);
+	stamp = div_s64(stamp, NSEC_PER_SEC);
 
 	if (info->flags & XT_TIME_LOCAL_TZ)
 		/* Adjust for local timezone */