libertas: convert CMD_802_11_RADIO_CONTROL to a direct command

and return errors for operations like join & scan that aren't possible
when the radio is turned off.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
index 5e4c4e4..dafe62e 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c
@@ -1051,7 +1051,7 @@
 	priv->mode = IW_MODE_INFRA;
 	priv->curbssparams.channel = DEFAULT_AD_HOC_CHANNEL;
 	priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
-	priv->radioon = RADIO_ON;
+	priv->radio_on = 1;
 	priv->enablehwauto = 1;
 	priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 	priv->psmode = LBS802_11POWERMODECAM;