Merge branch 'mvpp2-software-TSO-support'

Antoine Tenart says:

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net: mvpp2: software TSO support

This series adds the s/w TSO support in the PPv2 driver, in addition to
two cosmetic commits. As stated in patch 3/3:

Using iperf and 10G ports, using TSO shows a significant performance
improvement by a factor 2 to reach around 9.5Gbps in TX; as well as a
significant CPU usage drop (from 25% to 15%).
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Signed-off-by: David S. Miller <davem@davemloft.net>