cfg80211: take WoWLAN support information out of wiphy struct

There's no need to take up the space for devices that don't
support WoWLAN, and most drivers can even make the support
data static const (except where it's modified at runtime.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 6dd1959..6169fca 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -2654,7 +2654,7 @@
 	u32 hw_version;
 
 #ifdef CONFIG_PM
-	struct wiphy_wowlan_support wowlan;
+	const struct wiphy_wowlan_support *wowlan;
 	struct cfg80211_wowlan *wowlan_config;
 #endif