net: microchip: sparx5: Adding IS2 VCAP model to VCAP API

This provides the Sparx5 Ingress Stage 2 (IS2) model and adds it to the
VCAP control instance that will be provided to the VCAP API.

The Sparx5 IS2 C code model is generated from the Sparx5 RTL design model.

Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>