net: microchip: sparx5: Add ES2 VCAP model and updated KUNIT VCAP model

This provides the VCAP model for the Sparx5 ES2 (Egress Stage 2) VCAP.

This VCAP provides tagging and remarking functionality

This also renames a VCAP keyfield: VCAP_KF_MIRROR_ENA becomes
VCAP_KF_MIRROR_PROBE, as the first name was caused by a mistake in the
model transformation.

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