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/rdev-ops.h b/net/wireless/rdev-ops.h
index 8ae0c04..85ff30b 100644
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -1048,7 +1048,7 @@
 static inline int
 rdev_set_mcast_rate(struct cfg80211_registered_device *rdev,
 		    struct net_device *dev,
-		    int mcast_rate[IEEE80211_NUM_BANDS])
+		    int mcast_rate[NUM_NL80211_BANDS])
 {
 	int ret = -ENOTSUPP;