net: renesas: rswitch: Add .[gs]et_link_ksettings support

Add .[gs]et_link_ksettings support by using
phy_ethtool_[gs]et_link_ksettings() functions.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230807003231.1552062-3-yoshihiro.shimoda.uh@renesas.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/renesas/rswitch.c

@@ -1664,6 +1664,8 @@ static int rswitch_get_ts_info(struct net_device *ndev, struct ethtool_ts_info *
 
 static const struct ethtool_ops rswitch_ethtool_ops = {
 	.get_ts_info = rswitch_get_ts_info,
+	.get_link_ksettings = phy_ethtool_get_link_ksettings,
+	.set_link_ksettings = phy_ethtool_set_link_ksettings,
 };
 
 static const struct of_device_id renesas_eth_sw_of_table[] = {