p54: implement rfkill

This patch implements a basic rfkill support for p54 hardware and
removes a rfkill related WARNING:

fwio.c: In function ‘p54_setup_mac’:
fwio.c:323: warning: ‘radio_enabled’ is deprecated.

by abandoning radio_enable in flavour for IEEE80211_CONF_CHANGE_IDLE.

Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/p54/main.c b/drivers/net/wireless/p54/main.c
index b99ee9b..4a741df 100644
--- a/drivers/net/wireless/p54/main.c
+++ b/drivers/net/wireless/p54/main.c
@@ -288,6 +288,11 @@
 		if (ret)
 			goto out;
 	}
+	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
+		ret = p54_setup_mac(priv);
+		if (ret)
+			goto out;
+	}
 
 out:
 	mutex_unlock(&priv->conf_mutex);