[PATCH v2] ethdev: clarify rte_eth_tx_burst() return value and ownership semantics

[Morten Brørup]

> + * If a packet cannot be transmitted due to an error (for example, an
> + * invalid offload flag), the driver must still consume it and free
> the
> + * mbuf, rather than stopping at that point. Such packets should be
> + * counted in the *tx_errors* port statistic.
> + *

Looks like v1.
Please update with my feedback.

-Morten