CFG80211 support in wpa_supplicant

[Holger Schurig]

> Also NM doesn't show proper signal levels. I also created more 
or less a hack to make it work:

> +       if (max_qual->updated & IW_QUAL_DBM)


That looks like NM's signal level is still based on WEXT, 
IW_QUAL_xxx looks like a wext identifier.

On my device I use a self-written app that get's the signal/noise 
via nl80211 (like the "iw" tool), and then it works pretty nice.

-- 
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