libertas: move lbs_send_iwevcustom_event() to wext.c

... because it's purely a WEXT function.

No functional change.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/wext.h b/drivers/net/wireless/libertas/wext.h
index 4c08db4..607d0ff 100644
--- a/drivers/net/wireless/libertas/wext.h
+++ b/drivers/net/wireless/libertas/wext.h
@@ -4,6 +4,8 @@
 #ifndef	_LBS_WEXT_H_
 #define	_LBS_WEXT_H_
 
+void lbs_send_iwevcustom_event(struct lbs_private *priv, s8 *str);
+
 extern struct iw_handler_def lbs_handler_def;
 extern struct iw_handler_def mesh_handler_def;