staging/wireless: don't build when NET etc. are not enabled

These wireless drivers in staging could be built when
CONFIG_NET=n, CONFIG_NETDEVICES=n, causing this build error:

net/wireless/wext-priv.c: In function 'ioctl_private_call':
net/wireless/wext-priv.c:206: error: implicit declaration of function 'call_commit_handler'

due to faulty selects.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/staging/arlan/Kconfig

 config ARLAN
 	tristate "Aironet Arlan 655 & IC2200 DS support"
-	depends on ISA && !64BIT
+	depends on ISA && !64BIT && WLAN
 	select WIRELESS_EXT
 	---help---
 	  Aironet makes Arlan, a class of wireless LAN adapters. These use the

drivers/staging/netwave/Kconfig

 config PCMCIA_NETWAVE
 	tristate "Xircom Netwave AirSurfer Pcmcia wireless support"
-	depends on PCMCIA
+	depends on PCMCIA && WLAN
 	select WIRELESS_EXT
 	select WEXT_PRIV
 	help

drivers/staging/wavelan/Kconfig

 config WAVELAN
 	tristate "AT&T/Lucent old WaveLAN & DEC RoamAbout DS ISA support"
-	depends on ISA
+	depends on ISA && WLAN
 	select WIRELESS_EXT
 	select WEXT_SPY
 	select WEXT_PRIV
@@ -25,7 +25,7 @@ config WAVELAN
 
 config PCMCIA_WAVELAN
 	tristate "AT&T/Lucent old WaveLAN Pcmcia wireless support"
-	depends on PCMCIA
+	depends on PCMCIA && WLAN
 	select WIRELESS_EXT
 	select WEXT_SPY
 	select WEXT_PRIV