Merge branch 'netvsc-minor-fixes-and-improvements'

Stephen Hemminger says:

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netvsc: minor fixes and improvements

These are non-critical bug fixes, related to functionality now in net-next.
 1. delaying the automatic bring up of VF device to allow udev to change name.
 2. performance improvement
 3. handle MAC address change with VF; mostly propogate the error that VF gives.
 4. minor cleanups
 5. allow setting send/receive buffer size with ethtool.
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Signed-off-by: David S. Miller <davem@davemloft.net>