Add constants for the ieee 802.15.4 stack

IEEE 802.15.4 stack requires several constants to be defined/adjusted.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Sergey Lapin <slapin@ossfans.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if_ether.h b/include/linux/if_ether.h
index cfe4fe1..11a60e4 100644
--- a/include/linux/if_ether.h
+++ b/include/linux/if_ether.h
@@ -106,6 +106,7 @@
 #define ETH_P_DSA	0x001B		/* Distributed Switch Arch.	*/
 #define ETH_P_TRAILER	0x001C		/* Trailer switch tagging	*/
 #define ETH_P_PHONET	0x00F5		/* Nokia Phonet frames          */
+#define ETH_P_IEEE802154 0x00F6		/* IEEE802.15.4 frame		*/
 
 /*
  *	This is an Ethernet frame header.