cfg80211: remove enum ieee80211_band

This enum is already perfectly aliased to enum nl80211_band, and
the only reason for it is that we get IEEE80211_NUM_BANDS out of
it. There's no really good reason to not declare the number of
bands in nl80211 though, so do that and remove the cfg80211 one.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/dvm/debugfs.c
index 74c5161..f6591c8 100644
--- a/drivers/net/wireless/intel/iwlwifi/dvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/dvm/debugfs.c
@@ -335,7 +335,7 @@
 	if (!buf)
 		return -ENOMEM;
 
-	supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
+	supp_band = iwl_get_hw_mode(priv, NL80211_BAND_2GHZ);
 	if (supp_band) {
 		channels = supp_band->channels;
 
@@ -358,7 +358,7 @@
 					IEEE80211_CHAN_NO_IR ?
 					"passive only" : "active/passive");
 	}
-	supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
+	supp_band = iwl_get_hw_mode(priv, NL80211_BAND_5GHZ);
 	if (supp_band) {
 		channels = supp_band->channels;