gre: fix copy and paste error

The flags are dumped twice, the keys not at all.
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/ip_gre.c

@@ -1539,8 +1539,8 @@ static int ipgre_fill_info(struct sk_buff *skb, const struct net_device *dev)
 	NLA_PUT_U32(skb, IFLA_GRE_LINK, p->link);
 	NLA_PUT_BE16(skb, IFLA_GRE_IFLAGS, p->i_flags);
 	NLA_PUT_BE16(skb, IFLA_GRE_OFLAGS, p->o_flags);
-	NLA_PUT_BE32(skb, IFLA_GRE_IFLAGS, p->i_flags);
-	NLA_PUT_BE32(skb, IFLA_GRE_OFLAGS, p->o_flags);
+	NLA_PUT_BE32(skb, IFLA_GRE_IKEY, p->i_key);
+	NLA_PUT_BE32(skb, IFLA_GRE_OKEY, p->o_key);
 	NLA_PUT(skb, IFLA_GRE_LOCAL, 4, &p->iph.saddr);
 	NLA_PUT(skb, IFLA_GRE_REMOTE, 4, &p->iph.daddr);
 	NLA_PUT_U8(skb, IFLA_GRE_TTL, p->iph.ttl);