rndis_wlan: remove 'select WIRELESS_EXT' in Kconfig

Since rndis_wlan is now converted to cfg80211, WIRELESS_EXT isn't
required anymore.
Signed-off-by: NJussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/Kconfig

@@ -337,7 +337,6 @@ config USB_NET_RNDIS_WLAN
 	select USB_USBNET
 	select USB_NET_CDCETHER
 	select USB_NET_RNDIS_HOST
-	select WIRELESS_EXT
 	---help---
 	  This is a driver for wireless RNDIS devices.
 	  These are USB based adapters found in devices such as: