Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
index 60da049..ea4f17f 100644
--- a/drivers/net/ethernet/ethoc.c
+++ b/drivers/net/ethernet/ethoc.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/drivers/net/ethernet/ethoc.c
  *
  * Copyright (C) 2007-2008 Avionic Design Development GmbH
  * Copyright (C) 2008-2009 Avionic Design GmbH
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Written by Thierry Reding <thierry.reding@avionic-design.de>
  */
 
@@ -721,10 +718,7 @@
 		return err;
 	}
 
-	phy->advertising &= ~(ADVERTISED_1000baseT_Full |
-			      ADVERTISED_1000baseT_Half);
-	phy->supported &= ~(SUPPORTED_1000baseT_Full |
-			    SUPPORTED_1000baseT_Half);
+	phy_set_max_speed(phy, SPEED_100);
 
 	return 0;
 }
@@ -1156,7 +1150,7 @@
 		const void *mac;
 
 		mac = of_get_mac_address(pdev->dev.of_node);
-		if (mac)
+		if (!IS_ERR(mac))
 			ether_addr_copy(netdev->dev_addr, mac);
 		priv->phy_id = -1;
 	}