[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/drivers/net/wireless/wavelan.p.h b/drivers/net/wireless/wavelan.p.h
index 166e28b..5cb0bc8 100644
--- a/drivers/net/wireless/wavelan.p.h
+++ b/drivers/net/wireless/wavelan.p.h
@@ -98,11 +98,7 @@
  * characteristics of the hardware.  Applications such as mobile IP may
  * take advantage of it.
  *
- * You will need to enable the CONFIG_NET_RADIO define in the kernel
- * configuration to enable the wireless extensions (this is the one
- * giving access to the radio network device choice).
- *
- * It might also be a good idea as well to fetch the wireless tools to
+ * It might be a good idea as well to fetch the wireless tools to
  * configure the device and play a bit.
  */