ECM doesn't need to send ARP requests.

It is the responsibility of the host to send ARP request before
running the traffic, then the router will add its MAC addresses to its
ARP table after responding the request.

Change-Id: I853677b38007c8a1072dece39e3106cbcf69ea0b
Signed-off-by: Murat Sezgin <msezgin@codeaurora.org>
diff --git a/ecm_front_end_ipv4.c b/ecm_front_end_ipv4.c
index 0466f43..4761ca8 100644
--- a/ecm_front_end_ipv4.c
+++ b/ecm_front_end_ipv4.c
@@ -278,6 +278,7 @@
 	 * Get its MAC address (or some kind of equivalent we can use for the node address).
 	 */
 	if (!ecm_interface_mac_addr_get(addr, node_mac_addr, &on_link, gw_addr)) {
+#if 0
 		__be32 ipv4_addr;
 		__be32 src_ip;
 		DEBUG_TRACE("failed to obtain mac for host " ECM_IP_ADDR_DOT_FMT "\n", ECM_IP_ADDR_TO_DOT(addr));
@@ -306,6 +307,7 @@
 		 * By returning NULL the connection will not be created and the packet dropped.
 		 * However the sending will no doubt re-try the transmission and by that time we shall have the MAC for it.
 		 */
+#endif
 		return NULL;
 	}