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/net/wireless/ibss.c b/net/wireless/ibss.c
index 4c55fab..4a4dda5 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -104,7 +104,7 @@
 		struct ieee80211_supported_band *sband =
 			rdev->wiphy.bands[params->chandef.chan->band];
 		int j;
-		u32 flag = params->chandef.chan->band == IEEE80211_BAND_5GHZ ?
+		u32 flag = params->chandef.chan->band == NL80211_BAND_5GHZ ?
 			IEEE80211_RATE_MANDATORY_A :
 			IEEE80211_RATE_MANDATORY_B;
 
@@ -236,7 +236,7 @@
 			    struct wireless_dev *wdev)
 {
 	struct cfg80211_cached_keys *ck = NULL;
-	enum ieee80211_band band;
+	enum nl80211_band band;
 	int i, err;
 
 	ASSERT_WDEV_LOCK(wdev);
@@ -248,7 +248,7 @@
 	if (!wdev->wext.ibss.chandef.chan) {
 		struct ieee80211_channel *new_chan = NULL;
 
-		for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+		for (band = 0; band < NUM_NL80211_BANDS; band++) {
 			struct ieee80211_supported_band *sband;
 			struct ieee80211_channel *chan;