[qca-nss-sfe] Add infra to use flow interface number configured from ECM

Added infra to make SFE rules configurable
to use any interface number in the hierarchy.

Change-Id: Ie1dc5e29e2483b46f679d0fa1825323cb8c11139
Signed-off-by: Suruchi Suman <quic_surusuma@quicinc.com>
4 files changed