iwl_get_hw_mode
supp_band = iwl_get_hw_mode(priv, NL80211_BAND_2GHZ);
supp_band = iwl_get_hw_mode(priv, NL80211_BAND_5GHZ);
sband = iwl_get_hw_mode(priv, band);
sband = iwl_get_hw_mode(priv, band);