mpls: rtm_mpls_policy[] can be static

Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/mpls/af_mpls.c

@@ -216,7 +216,7 @@ static struct packet_type mpls_packet_type __read_mostly = {
 	.func = mpls_forward,
 };
 
-const struct nla_policy rtm_mpls_policy[RTA_MAX+1] = {
+static const struct nla_policy rtm_mpls_policy[RTA_MAX+1] = {
 	[RTA_DST]		= { .type = NLA_U32 },
 	[RTA_OIF]		= { .type = NLA_U32 },
 };