Staging: wlan-ng: remove dependency on WIRELESS_EXT version

As the driver is in mainline now we can remove such dependency.
WIRELESS_EXT is 22 now and it is always defined.

Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/wlan-ng/prism2sta.c

@@ -1444,9 +1444,7 @@ void prism2sta_processing_defer(struct work_struct *data)
 	}
 
 	wlandev->linkstatus = (hw->link_status == HFA384x_LINK_CONNECTED);
-#ifdef WIRELESS_EXT
 	p80211wext_event_associated(wlandev, wlandev->linkstatus);
-#endif
 
 failed:
 	return;