dts: add l2fwd test suite

Add a basic L2 forwarding test suite which tests the correct
functionality of the forwarding facility built-in in the DPDK.

The tests are performed with different queues n

dts: add l2fwd test suite

Add a basic L2 forwarding test suite which tests the correct
functionality of the forwarding facility built-in in the DPDK.

The tests are performed with different queues numbers per port.

Signed-off-by: Luca Vizzarro <luca.vizzarro@arm.com>
Signed-off-by: Thomas Wilks <thomas.wilks@arm.com>
Reviewed-by: Paul Szczepanek <paul.szczepanek@arm.com>
Reviewed-by: Dean Marx <dmarx@iol.unh.edu>
Reviewed-by: Patrick Robb <probb@iol.unh.edu>
Tested-by: Patrick Robb <probb@iol.unh.edu>

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