cfg80211: add rfkill support

To be easier on drivers and users, have cfg80211 register an
rfkill structure that drivers can access. When soft-killed,
simply take down all interfaces; when hard-killed the driver
needs to notify us and we will take down the interfaces
after the fact. While rfkilled, interfaces cannot be set UP.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 3912b53..b13446a 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -181,4 +181,11 @@
 						sta, tid, ssn);
 	return -EOPNOTSUPP;
 }
+
+
+static inline void drv_rfkill_poll(struct ieee80211_local *local)
+{
+	if (local->ops->rfkill_poll)
+		local->ops->rfkill_poll(&local->hw);
+}
 #endif /* __MAC80211_DRIVER_OPS */