libertas: fix for wireless Kconfig changes

Need to change the libertas Kconfig entry to match changes made for
other wireless drivers.
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/net/wireless/Kconfig

@@ -267,7 +267,7 @@ config IPW2200_DEBUG
 
 config LIBERTAS_USB
 	tristate "Marvell Libertas 8388 802.11a/b/g cards"
-	depends on NET_RADIO && USB
+	depends on USB && WLAN_80211
 	select FW_LOADER
 	---help---
 	  A driver for Marvell Libertas 8388 USB devices.