drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/eepro.c b/drivers/net/eepro.c
index bf9efa7..09ff9b9 100644
--- a/drivers/net/eepro.c
+++ b/drivers/net/eepro.c
@@ -743,7 +743,7 @@
 		printEEPROMInfo(dev);
 }
 
-static struct ethtool_ops eepro_ethtool_ops;
+static const struct ethtool_ops eepro_ethtool_ops;
 
 /* This is the real probe routine.  Linux has a history of friendly device
    probes on the ISA bus.  A good device probe avoids doing writes, and
@@ -1771,7 +1771,7 @@
 	sprintf(drvinfo->bus_info, "ISA 0x%lx", dev->base_addr);
 }
 
-static struct ethtool_ops eepro_ethtool_ops = {
+static const struct ethtool_ops eepro_ethtool_ops = {
 	.get_settings	= eepro_ethtool_get_settings,
 	.get_drvinfo 	= eepro_ethtool_get_drvinfo,
 };