net: Move the definition of the default Geneve udp port to public header file

Move the definition of the default Geneve udp port from the geneve
source to the header file, so we can re-use it from drivers.
Modify existing drivers to use it.

Signed-off-by: Moshe Shemesh <[e-mail]>
Reviewed-by: Or Gerlitz <[e-mail]>
Cc: John Hurley <[e-mail]>
Cc: Jakub Kicinski <[e-mail]>
Reviewed-by: Tariq Toukan <[e-mail]>
Acked-by: Jakub Kicinski <[e-mail]>
Signed-off-by: Saeed Mahameed <[e-mail]>

drivers/net/ethernet/netronome/nfp/flower/action.c

···
 	switch (tun->key.tp_dst) {
 	case htons(NFP_FL_VXLAN_PORT):
 		return NFP_FL_TUNNEL_VXLAN;
-	case htons(NFP_FL_GENEVE_PORT):
+	case htons(GENEVE_UDP_PORT):
 		if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)
 			return NFP_FL_TUNNEL_GENEVE;
 		/* FALLTHROUGH */

drivers/net/ethernet/netronome/nfp/flower/main.h

···
 #define NFP_FL_MASK_ID_LOCATION		1
 
 #define NFP_FL_VXLAN_PORT		4789
-#define NFP_FL_GENEVE_PORT		6081
 
 /* Extra features bitmap. */
 #define NFP_FL_FEATS_GENEVE		BIT(0)

drivers/net/ethernet/netronome/nfp/flower/offload.c

···
 			if (enc_op.key)
 				return -EOPNOTSUPP;
 			break;
-		case htons(NFP_FL_GENEVE_PORT):
+		case htons(GENEVE_UDP_PORT):
 			if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE))
 				return -EOPNOTSUPP;
 			*tun_type = NFP_FL_TUNNEL_GENEVE;

drivers/net/geneve.c

···
 
 #define GENEVE_NETDEV_VER	"0.6"
 
-#define GENEVE_UDP_PORT		6081
-
 #define GENEVE_N_VID		(1u << 24)
 #define GENEVE_VID_MASK		(GENEVE_N_VID - 1)
 

include/net/geneve.h

···
 
 #include <net/udp_tunnel.h>
 
+#define GENEVE_UDP_PORT		6081
+
 /* Geneve Header:
  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  *  |Ver|  Opt Len  |O|C|    Rsvd.  |          Protocol Type        |