[qca-nss-ecm] Prevent acceleration of connection if regeneration is not complete.

- Serialize regeneration operation for a connection among multiple contexts.
- Do not push rules to acceleration engine if regeneration is not complete.

Change-Id: Id3aa234a3d0d46216b47bb2fa5c7fd4e8ffff8f4
Signed-off-by: Tushar Mathur <tushar@codeaurora.org>
Signed-off-by: Gareth Williams <garethw@codeaurora.org>
16 files changed