can: flexcan: export flexcan_ethtool_ops and remove flexcan_set_ethtool_ops()

The function flexcan_set_ethtool_ops() does one thing: populate
net_device::ethtool_ops. Instead, it is possible to directly assign
this field and remove one function call and slightly reduce the object
size. To do so, export flexcan_ethtool_ops so it becomes visible to
flexcan-core.c.
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20220727104939.279022-4-mailhol.vincent@wanadoo.frSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/flexcan/flexcan-core.c

@@ -2113,7 +2113,7 @@ static int flexcan_probe(struct platform_device *pdev)
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
 	dev->netdev_ops = &flexcan_netdev_ops;
-	flexcan_set_ethtool_ops(dev);
+	dev->ethtool_ops = &flexcan_ethtool_ops;
 	dev->irq = irq;
 	dev->flags |= IFF_ECHO;
 

drivers/net/can/flexcan/flexcan-ethtool.c

@@ -100,15 +100,10 @@ static int flexcan_get_sset_count(struct net_device *netdev, int sset)
 	}
 }
 
-static const struct ethtool_ops flexcan_ethtool_ops = {
+const struct ethtool_ops flexcan_ethtool_ops = {
 	.get_ringparam = flexcan_get_ringparam,
 	.get_strings = flexcan_get_strings,
 	.get_priv_flags = flexcan_get_priv_flags,
 	.set_priv_flags = flexcan_set_priv_flags,
 	.get_sset_count = flexcan_get_sset_count,
 };
-
-void flexcan_set_ethtool_ops(struct net_device *netdev)
-{
-	netdev->ethtool_ops = &flexcan_ethtool_ops;
-}

drivers/net/can/flexcan/flexcan.h

@@ -114,7 +114,7 @@ struct flexcan_priv {
 	void (*write)(u32 val, void __iomem *addr);
 };
 
-void flexcan_set_ethtool_ops(struct net_device *dev);
+extern const struct ethtool_ops flexcan_ethtool_ops;
 
 static inline bool
 flexcan_supports_rx_mailbox(const struct flexcan_priv *priv)