netdev: drivers should make ethtool_ops const

No need to put ethtool_ops in data, they should be const.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/libertas/dev.h b/drivers/net/wireless/libertas/dev.h
index 578c697..d3b69a4 100644
--- a/drivers/net/wireless/libertas/dev.h
+++ b/drivers/net/wireless/libertas/dev.h
@@ -14,7 +14,7 @@
 #include "defs.h"
 #include "hostcmd.h"
 
-extern struct ethtool_ops lbs_ethtool_ops;
+extern const struct ethtool_ops lbs_ethtool_ops;
 
 #define	MAX_BSSID_PER_CHANNEL		16