r8169: add support for RTL8126A

This adds support for the RTL8126A found on Asus z790 Maximus Formula.
It was successfully tested w/o the firmware at 1000Mbps. Firmware file
has been provided by Realtek and submitted to linux-firmware.
2.5G and 5G modes are untested.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/r8169.h

@@ -68,6 +68,7 @@ enum mac_version {
 	/* support for RTL_GIGA_MAC_VER_60 has been removed */
 	RTL_GIGA_MAC_VER_61,
 	RTL_GIGA_MAC_VER_63,
+	RTL_GIGA_MAC_VER_65,
 	RTL_GIGA_MAC_NONE
 };
 

drivers/net/ethernet/realtek/r8169_phy_config.c

@@ -1102,6 +1102,12 @@ static void rtl8125b_hw_phy_config(struct rtl8169_private *tp,
 	rtl8125b_config_eee_phy(phydev);
 }
 
+static void rtl8126a_hw_phy_config(struct rtl8169_private *tp,
+				   struct phy_device *phydev)
+{
+	r8169_apply_firmware(tp);
+}
+
 void r8169_hw_phy_config(struct rtl8169_private *tp, struct phy_device *phydev,
 			 enum mac_version ver)
 {
@@ -1152,6 +1158,7 @@ void r8169_hw_phy_config(struct rtl8169_private *tp, struct phy_device *phydev,
 		[RTL_GIGA_MAC_VER_53] = rtl8117_hw_phy_config,
 		[RTL_GIGA_MAC_VER_61] = rtl8125a_2_hw_phy_config,
 		[RTL_GIGA_MAC_VER_63] = rtl8125b_hw_phy_config,
+		[RTL_GIGA_MAC_VER_65] = rtl8126a_hw_phy_config,
 	};
 
 	if (phy_configs[ver])