cfg80211: notify dfs state changes

call the reg notifier on dfs state changes

Signed-off-by: Eliad Peller <eliad@wizery.com>
wlcore: add dfs master restart calls

call wlcore_cmd_dfs_master_restart when starting
the ap on a new channel.

Add a new WLVIF_FLAG_BEACON_DISABLED flag to
indicate that dfs_master_restart command
is required.

Signed-off-by: Eliad Peller <eliad@wizery.com>
wlcore: consider dfs in regdomain configuration

consider the channel available in case of dfs
channel with dfs_available state.

TODO: we might want to no automatically set
NO_IR in case of radar (instead of setting
it and then checking for it explicitly here...)

Signed-off-by: Eliad Peller <eliad@wizery.com>