[PATCH] net/: fix the WIRELESS_EXT abuse

This patch contains the following changes:
- add a CONFIG_WIRELESS_EXT select'ed by NET_RADIO for conditional
  code
- remove the now no longer required #ifdef CONFIG_NET_RADIO from some
  #include's

Based on a patch by Jean Tourrilhes <jt@hpl.hp.com>.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/Kconfig b/net/Kconfig
index bc603d9..d621688 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -217,6 +217,9 @@
 source "net/bluetooth/Kconfig"
 source "net/ieee80211/Kconfig"
 
+config WIRELESS_EXT
+	bool
+
 endif   # if NET
 endmenu # Networking