[qca-nss-drv] Capwap update for DTLS support

1. Capwap can now be enable on either core based on platform data
   configuration
2. Enable capwap to support creating tunnel with DTLS

Change-Id: I0be1553689cf847c779b8aeafeaba9a29afb16ca
Signed-off-by: Stephen Wang <wstephen@codeaurora.org>
8 files changed