wireless: default CONFIG_WLAN to y

When this was added no defaults were set and it seems
this implies n. Default this to y.
Reported-by: NJouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/Kconfig

@@ -5,6 +5,7 @@
 menuconfig WLAN
 	bool "Wireless LAN"
 	depends on !S390
+	default y
 	---help---
 	  This section contains all the pre 802.11 and 802.11 wireless
 	  device drivers. For a complete list of drivers and documentation