Merge branch 'ionic-cleanups-and-perf-tuning'

Shannon Nelson says:

====================
ionic: code cleanup and performance tuning

Brett has been performance testing and code tweaking and has
come up with several improvements for our fast path operations.

In a simple single thread / single queue iperf case on a 1500 MTU
connection we see an improvement from 74.2 to 86.7 Gbits/sec.
====================

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