udp_tunnel: re-number the offload tunnel types

Make it possible to use tunnel types as flags more easily.
There doesn't appear to be any user using the type as an
array index, so this should make no difference.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/udp_tunnel.h

@@ -106,9 +106,9 @@ void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
  * call this function to perform Tx offloads on outgoing traffic.
  */
 enum udp_parsable_tunnel_type {
-	UDP_TUNNEL_TYPE_VXLAN,		/* RFC 7348 */
-	UDP_TUNNEL_TYPE_GENEVE,		/* draft-ietf-nvo3-geneve */
-	UDP_TUNNEL_TYPE_VXLAN_GPE,	/* draft-ietf-nvo3-vxlan-gpe */
+	UDP_TUNNEL_TYPE_VXLAN	  = BIT(0), /* RFC 7348 */
+	UDP_TUNNEL_TYPE_GENEVE	  = BIT(1), /* draft-ietf-nvo3-geneve */
+	UDP_TUNNEL_TYPE_VXLAN_GPE = BIT(2), /* draft-ietf-nvo3-vxlan-gpe */
 };
 
 struct udp_tunnel_info {