arp:add error counters for all failure cases

Change-Id: Ided6c661edc9e2035fd7b472c312e2380d3f9c0b
Signed-off-by: Eyal Bari <ebari@cisco.com>
diff --git a/src/vnet/ethernet/arp_packet.h b/src/vnet/ethernet/arp_packet.h
index e5f424d..206be41 100644
--- a/src/vnet/ethernet/arp_packet.h
+++ b/src/vnet/ethernet/arp_packet.h
@@ -109,11 +109,11 @@
 
 typedef enum
 {
-  IP4_ARP_ERROR_DROP,
+  IP4_ARP_ERROR_THROTTLED,
+  IP4_ARP_ERROR_RESOLVED,
+  IP4_ARP_ERROR_NO_BUFFERS,
   IP4_ARP_ERROR_REQUEST_SENT,
   IP4_ARP_ERROR_NON_ARP_ADJ,
-  IP4_ARP_ERROR_REPLICATE_DROP,
-  IP4_ARP_ERROR_REPLICATE_FAIL,
   IP4_ARP_ERROR_NO_SOURCE_ADDRESS,
 } ip4_arp_error_t;