Merge branch 'systemport-tx-napi-improvements'

Florian Fainelli says:

====================
net: systemport: TX/NAPI improvements

This patch series builds up on Doug's latest changes done in BCMGENET to reduce
the number of spurious interrupts in NAPI, simplify pointer arithmetic and
finally tracking of per TX ring statistics to be SMP friendly.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>