net: stmmac: switch no PTP HW support message to info level

If HW doesn't support PTP, then it doesn't support it. This is neither
a problem nor can the user do something about it. Therefore change the
message level to info.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/ee685745-f1ab-e9bf-f20e-077d55dff441@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -3275,7 +3275,7 @@ static int stmmac_hw_setup(struct net_device *dev, bool ptp_register)
 
 	ret = stmmac_init_ptp(priv);
 	if (ret == -EOPNOTSUPP)
-		netdev_warn(priv->dev, "PTP not supported by HW\n");
+		netdev_info(priv->dev, "PTP not supported by HW\n");
 	else if (ret)
 		netdev_warn(priv->dev, "PTP init failed\n");
 	else if (ptp_register)