[qca-nss-ecm] Keep neigh entries updated

There is no need to update the neigh entry in the ECM,
Linux already does it. Because the ARP packets are not
accelerated.
Send neigh event to the hosts, if we send TX packets to these
hosts.
We don't need to do anything for neigh entries for bridge flows.

Change-Id: I8915f884bff6af04abb651e57e4903a7684eb681
Signed-off-by: Murat Sezgin <msezgin@codeaurora.org>
4 files changed