staging: wilc1000: removes WIRELESS_EXT

This patch removes WIRELESS_EXT.
Does not used the WIRELESS_EXT define.
Signed-off-by: Leo Kim <leo.kim@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/Kconfig

 config WILC1000
 	tristate
-	select WIRELESS_EXT
 	---help---
 	  This module only support IEEE 802.11n WiFi.