rt2x00: Use IEEE80211_IF_TYPE_INVALID directly

No need to use a seperate define INVALID_INTERFACE while
we can use IEEE80211_IF_TYPE_INVALID directly.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00.h

@@ -369,10 +369,8 @@ struct interface {
 
 	/*
 	 * Current working type (IEEE80211_IF_TYPE_*).
-	 * When set to INVALID_INTERFACE, no interface is configured.
 	 */
 	int type;
-#define INVALID_INTERFACE	IEEE80211_IF_TYPE_INVALID
 
 	/*
 	 * MAC of the device.

drivers/net/wireless/rt2x00/rt2x00dev.c

@@ -1170,7 +1170,7 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
 	/*
 	 * Reset current working type.
 	 */
-	rt2x00dev->interface.type = INVALID_INTERFACE;
+	rt2x00dev->interface.type = IEEE80211_IF_TYPE_INVALID;
 
 	/*
 	 * Allocate ring array.

drivers/net/wireless/rt2x00/rt2x00mac.c

@@ -242,7 +242,7 @@ void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
 		return;
 
 	intf->id = 0;
-	intf->type = INVALID_INTERFACE;
+	intf->type = IEEE80211_IF_TYPE_INVALID;
 	memset(&intf->bssid, 0x00, ETH_ALEN);
 	memset(&intf->mac, 0x00, ETH_ALEN);