odp-util: Export odp_tun_key_from_attr()

Rename tun_key_from_attr() as odp_tun_key_from_attr() and export it.
This is in preparation for calling this function outside of odp-util.c.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Ben Pfaff <blp@nicira.com>

lib/odp-util.h

@@ -87,6 +87,9 @@ struct odputil_keybuf {
     uint32_t keybuf[DIV_ROUND_UP(ODPUTIL_FLOW_KEY_BYTES, 4)];
 };
 
+enum odp_key_fitness odp_tun_key_from_attr(const struct nlattr *,
+                                           struct flow_tnl *);
+
 void odp_flow_key_format(const struct nlattr *, size_t, struct ds *);
 int odp_flow_key_from_string(const char *s, const struct simap *port_names,
                              struct ofpbuf *);