While here, also get rid of netdev_del_station. The only user of this
function was in ap.c and it could easily be replaced by invoking the new
nl80211_build_del_station function. The callback used by
netdev_build_del_station only printed an error and didn't do anything
useful. Get rid of it for now.
As additional frequency info is needed it doesn't make sense to
store a full list of frequencies for every attribute (i.e.
supported, disabled, no-IR, etc).
This changes nl80211_parse_supported_frequencies to take a list
of frequency attributes where each index corresponds to a channel,
and each value can be filled with flag bits to signal any
limitations on that frequency.
wiphy.c then had to be updated to use this rather than the existing
scan_freq_set lists. This, as-is, will break anything using
wiphy_get_disabled_freqs().
Denis Kenzior