add ERSPAN headers

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

include/linux/if_ether.h

@@ -66,6 +66,7 @@
 #define ETH_P_ATALK	0x809B		/* Appletalk DDP		*/
 #define ETH_P_AARP	0x80F3		/* Appletalk AARP		*/
 #define ETH_P_8021Q	0x8100          /* 802.1Q VLAN Extended Header  */
+#define ETH_P_ERSPAN	0x88BE		/* ERSPAN type II		*/
 #define ETH_P_IPX	0x8137		/* IPX over DIX			*/
 #define ETH_P_IPV6	0x86DD		/* IPv6 over bluebook		*/
 #define ETH_P_PAUSE	0x8808		/* IEEE Pause frames. See 802.3 31B */

include/linux/if_tunnel.h

@@ -134,6 +134,7 @@ enum {
 	IFLA_GRE_COLLECT_METADATA,
 	IFLA_GRE_IGNORE_DF,
 	IFLA_GRE_FWMARK,
+	IFLA_GRE_ERSPAN_INDEX,
 	__IFLA_GRE_MAX,
 };