net: sfp: allow use 2500base-X for 2500base-T modules

Allow use of 2500base-X interface mode for PHY modules that support
2500base-T.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Daniel Machon <daniel.machon@microchip.com>
Link: https://lore.kernel.org/r/E1s15rv-00AHyk-5S@rmk-PC.armlinux.org.ukSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/phy/sfp-bus.c

@@ -373,7 +373,8 @@ phy_interface_t sfp_select_interface(struct sfp_bus *bus,
 	if (phylink_test(link_modes, 5000baseT_Full))
 		return PHY_INTERFACE_MODE_5GBASER;
 
-	if (phylink_test(link_modes, 2500baseX_Full))
+	if (phylink_test(link_modes, 2500baseX_Full) ||
+	    phylink_test(link_modes, 2500baseT_Full))
 		return PHY_INTERFACE_MODE_2500BASEX;
 
 	if (phylink_test(link_modes, 1000baseT_Half) ||