[qca-nss-ecm] Improve NSS / HyFi integration

- Only allow FDB updates to directly connected legacy devices to
  decelerate flows (to prevent constant flip-flopping of connections
  when both backhaul interfaces are used). FDB updates for devices not
  directly connected will not decelerate flows. It is the responsibility
  of the Hy-Fi userspace to do that when the topology truly has changed.
- Mark connection as decelerated when connection is destroyed

Change-Id: Id437a7bfd977f60e66ebbf0b7c2cf3b3be412486
Signed-off-by: Murat Sezgin <msezgin@codeaurora.org>
4 files changed