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/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index b54f398..14c5ba3 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -436,7 +436,7 @@
 
 
 static void
-calc_rate_durations(enum ieee80211_band band,
+calc_rate_durations(enum nl80211_band band,
 		    struct minstrel_rate *d,
 		    struct ieee80211_rate *rate,
 		    struct cfg80211_chan_def *chandef)
@@ -579,7 +579,7 @@
 	if (!mi)
 		return NULL;
 
-	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+	for (i = 0; i < NUM_NL80211_BANDS; i++) {
 		sband = hw->wiphy->bands[i];
 		if (sband && sband->n_bitrates > max_rates)
 			max_rates = sband->n_bitrates;
@@ -621,7 +621,7 @@
 	u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef);
 	int i, j;
 
-	sband = mp->hw->wiphy->bands[IEEE80211_BAND_2GHZ];
+	sband = mp->hw->wiphy->bands[NL80211_BAND_2GHZ];
 	if (!sband)
 		return;