vxlan: fix multiple inclusion of vxlan.h

The vxlan_get_sk_family inline function was added after the last #endif,
making multiple inclusion of net/vxlan.h fail. Move it to the proper place.
Reported-by: Mark Rustad <mark.d.rustad@intel.com>
Fixes: 705cc62f ("vxlan: provide access function for vxlan socket address family")
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/vxlan.h

@@ -241,9 +241,10 @@ static inline void vxlan_get_rx_port(struct net_device *netdev)
 {
 }
 #endif
-#endif
 
 static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs)
 {
 	return vs->sock->sk->sk_family;
 }
+
+#endif