net: phylink: use phylink_expects_phy() in phylink_fwnode_phy_connect()

The tests in phylink_expects_phy() and phylink_fwnode_phy_connect() are
identical (by intention). Use phylink_expects_phy() to decide whether
to ignore a call to phylink_fwnode_phy_connect().

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/E1w4zHg-0000000DmC4-2oyb@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Russell King (Oracle)

drivers/net/phy/phylink.c

@@ -2295,14 +2295,12 @@ int phylink_fwnode_phy_connect(struct phylink *pl,
 	struct phy_device *phy_dev;
 	int ret;
 
-	/* Fixed links and 802.3z are handled without needing a PHY */
-	if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
-	    (pl->cfg_link_an_mode == MLO_AN_INBAND &&
-	     phy_interface_mode_is_8023z(pl->link_interface)))
+	if (!phylink_expects_phy(pl))
 		return 0;
 
 	phy_fwnode = fwnode_get_phy_node(fwnode);
 	if (IS_ERR(phy_fwnode)) {
+		/* PHY mode requires a PHY to be specified. */
 		if (pl->cfg_link_an_mode == MLO_AN_PHY)
 			return -ENODEV;
 		return 0;