mac80211/cfg80211: move iwrange handler to cfg80211

The previous patch made cfg80211 generally aware of the signal
type a given hardware will give, so now it can implement
SIOCGIWRANGE itself, removing more wext stuff from mac80211.
Might need to be a little more parametrized once we have
more hardware using cfg80211 and new hardware capabilities.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index e031274..43ac90d 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -765,6 +765,9 @@
 int cfg80211_wext_giwscan(struct net_device *dev,
 			  struct iw_request_info *info,
 			  struct iw_point *data, char *extra);
+int cfg80211_wext_giwrange(struct net_device *dev,
+			   struct iw_request_info *info,
+			   struct iw_point *data, char *extra);
 
 /**
  * cfg80211_scan_done - notify that scan finished