Networking: Need to set the IPv6 EtherType on outgoing IPv6 packets

net/icmpv6/icmpv6_input.c

@@ -218,6 +218,10 @@ void icmpv6_input(FAR struct net_driver_s *dev)
 
               memcpy(eth->dest, eth->src, ETHER_ADDR_LEN);
               memcpy(eth->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
+
+              /* Set the IPv6 Ethernet type */
+
+              eth->type  = HTONS(ETHTYPE_IP6);
             }
 #endif
         }

net/icmpv6/icmpv6_solicit.c

@@ -186,6 +186,9 @@ void icmpv6_solicit(FAR struct net_driver_s *dev,
 
       memcpy(eth->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
 
+      /* Set the IPv6 Ethernet type */
+
+      eth->type  = HTONS(ETHTYPE_IP6);
 #if 0
       /* No additional neighbor lookup is required on this packet.
        * REVISIT:  It is inappropriate to set this bit if we get here