ipv6: trivial, add bracket for the if block

The "else" block is on several lines and use bracket.
Signed-off-by: NFlorent Fourcot <florent.fourcot@enst-bretagne.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ip6_flowlabel.c

@@ -769,10 +769,10 @@ static void ip6fl_seq_stop(struct seq_file *seq, void *v)
 static int ip6fl_seq_show(struct seq_file *seq, void *v)
 {
 	struct ip6fl_iter_state *state = ip6fl_seq_private(seq);
-	if (v == SEQ_START_TOKEN)
+	if (v == SEQ_START_TOKEN) {
 		seq_printf(seq, "%-5s %-1s %-6s %-6s %-6s %-8s %-32s %s\n",
 			   "Label", "S", "Owner", "Users", "Linger", "Expires", "Dst", "Opt");
-	else {
+	} else {
 		struct ip6_flowlabel *fl = v;
 		seq_printf(seq,
 			   "%05X %-1d %-6d %-6d %-6ld %-8ld %pi6 %-4d\n",