net: dsa: mt753x: remove mt753x_phylink_pcs_link_up()

Remove the mt753x_phylink_pcs_link_up() function for two reasons:

1) priv->pcs[i].pcs.neg_mode is set true, meaning it doesn't take a
   MLO_AN_FIXED anymore, but one of PHYLINK_PCS_NEG_*. However, this
   is inconsequential due to...
2) priv->pcs[port].pcs.ops is always initialised to point at
   mt7530_pcs_ops, which does not have a pcs_link_up() member.

So, let's remove mt753x_phylink_pcs_link_up() entirely.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/E1qlTQS-008BWe-Va@rmk-PC.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/mt7530.c

@@ -2824,15 +2824,6 @@ static void mt753x_phylink_mac_link_down(struct dsa_switch *ds, int port,
 	mt7530_clear(priv, MT7530_PMCR_P(port), PMCR_LINK_SETTINGS_MASK);
 }
 
-static void mt753x_phylink_pcs_link_up(struct phylink_pcs *pcs,
-				       unsigned int mode,
-				       phy_interface_t interface,
-				       int speed, int duplex)
-{
-	if (pcs->ops->pcs_link_up)
-		pcs->ops->pcs_link_up(pcs, mode, interface, speed, duplex);
-}
-
 static void mt753x_phylink_mac_link_up(struct dsa_switch *ds, int port,
 				       unsigned int mode,
 				       phy_interface_t interface,
@@ -2921,8 +2912,6 @@ mt7531_cpu_port_config(struct dsa_switch *ds, int port)
 		return ret;
 	mt7530_write(priv, MT7530_PMCR_P(port),
 		     PMCR_CPU_PORT_SETTING(priv->id));
-	mt753x_phylink_pcs_link_up(&priv->pcs[port].pcs, MLO_AN_FIXED,
-				   interface, speed, DUPLEX_FULL);
 	mt753x_phylink_mac_link_up(ds, port, MLO_AN_FIXED, interface, NULL,
 				   speed, DUPLEX_FULL, true, true);