Merge pull request #451 from pwieczorkiewicz/wireless

Wireless: linkup indicates assosciation (bnc#893665)
ethernet: handle ethtool offload as independent structure
ethtool: Refactor handling of independed ethtool ioctl

One ioctl failing should not block the other ones.
Merge branch 'master' into testing
Merge remote-tracking branch 'origin/ethtool-nofail' into testing