net: phy: c45: detect the BASE-T1 speed from the ability register

Read the ability to do 100BASE-T1 and 1000BASE-T1 from the extended
BASE-T1 ability register of the PHY.

Signed-off-by: Stefan Eichenberger <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: Paolo Abeni <[e-mail]>

drivers/net/phy/phy-c45.c

···
 			 phydev->supported,
 			 val & MDIO_PMA_PMD_BT1_B10L_ABLE);
 
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
+			 phydev->supported,
+			 val & MDIO_PMA_PMD_BT1_B100_ABLE);
+
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT,
+			 phydev->supported,
+			 val & MDIO_PMA_PMD_BT1_B1000_ABLE);
+
 	val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_STAT);
 	if (val < 0)
 		return val;