wireless: remove WLAN_80211 and WLAN_PRE80211 from Kconfig

With the WLAN_PRE80211 drivers moved to drivers/staging, this
distinction becomes unnecessary.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/Kconfig b/drivers/net/wireless/libertas/Kconfig
index 8f8d75b..30aa9d4 100644
--- a/drivers/net/wireless/libertas/Kconfig
+++ b/drivers/net/wireless/libertas/Kconfig
@@ -1,6 +1,6 @@
 config LIBERTAS
 	tristate "Marvell 8xxx Libertas WLAN driver support"
-	depends on WLAN_80211 && CFG80211
+	depends on CFG80211
 	select WIRELESS_EXT
 	select WEXT_SPY
 	select LIB80211