[qca-nss-clients] Add PPPoE clients.

Create/Destroy PPPoE session rules in NSS FW.
PPPoE client package monitors the PPP channel
connect/disconnect events and creates/destroys
the dynamic interfaces based on these events.

Change-Id: I0344f3184a60eb200bbe37094633b94cc74c1d04
Signed-off-by: Murat Sezgin <msezgin@codeaurora.org>
5 files changed