intel: correct return from set features callback

According to comments in <linux/netdevice.h> we should return either >0
or -errno from ->ndo_set_features() if changing dev->features by itself.

Return 1 in such places to notify netdev_update_features() about applied
changes in dev->features.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/e100.c

@@ -2797,7 +2797,7 @@ static int e100_set_features(struct net_device *netdev,
 
 	netdev->features = features;
 	e100_exec_cb(nic, NULL, e100_configure);
-	return 0;
+	return 1;
 }
 
 static const struct net_device_ops e100_netdev_ops = {

drivers/net/ethernet/intel/e1000/e1000_main.c

@@ -820,7 +820,7 @@ static int e1000_set_features(struct net_device *netdev,
 	else
 		e1000_reset(adapter);
 
-	return 0;
+	return 1;
 }
 
 static const struct net_device_ops e1000_netdev_ops = {

drivers/net/ethernet/intel/e1000e/netdev.c

@@ -7003,7 +7003,7 @@ static int e1000_set_features(struct net_device *netdev,
 	else
 		e1000e_reset(adapter);
 
-	return 0;
+	return 1;
 }
 
 static const struct net_device_ops e1000e_netdev_ops = {

drivers/net/ethernet/intel/igb/igb_main.c

@@ -2480,7 +2480,7 @@ static int igb_set_features(struct net_device *netdev,
 	else
 		igb_reset(adapter);
 
-	return 0;
+	return 1;
 }
 
 static int igb_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -9796,7 +9796,7 @@ static int ixgbe_set_features(struct net_device *netdev,
 			    NETIF_F_HW_VLAN_CTAG_FILTER))
 		ixgbe_set_rx_mode(netdev);
 
-	return 0;
+	return 1;
 }
 
 /**