ipv4: Make fib_encap_match static

Make fib_encap_match() static as it isn't used outside the file.
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/fib_semantics.c

@@ -533,7 +533,7 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
 
 #endif
 
-int fib_encap_match(struct net *net, u16 encap_type,
+static int fib_encap_match(struct net *net, u16 encap_type,
 			   struct nlattr *encap,
 			   int oif, const struct fib_nh *nh)
 {