cfg80211: self-contained wext handling where possible

Finally! This is what you've all been waiting for!

This patch makes cfg80211 take care of wext emulation
_completely_ by itself, drivers that don't need things
cfg80211 doesn't do yet don't even need to be aware of
wireless extensions.
This means we can also clean up mac80211's and iwm's
Kconfig and make it possible to build them w/o wext
now!

		RIP wext.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/wireless/wext-compat.h

@@ -1,6 +1,9 @@
 #ifndef __WEXT_COMPAT
 #define __WEXT_COMPAT
 
+#include <net/iw_handler.h>
+#include <linux/wireless.h>
+
 int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
 			       struct iw_request_info *info,
 			       struct iw_freq *freq, char *extra);
@@ -42,4 +45,6 @@ int cfg80211_mgd_wext_giwessid(struct net_device *dev,
 struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy,
 					     struct iw_freq *freq);
 
+
+extern const struct iw_handler_def cfg80211_wext_handler;
 #endif /* __WEXT_COMPAT */