configs: Bananapi_M2_Ultra: enable gigabit ethernet

Enable the gigabit ethernet for the Bananapi M2 Ultra board.
Tested on BananaPi M2 Berry (R40), custom board (V40)

Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Lothar Felten <lothar.felten@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Tested-by: Jagan Teki <jagan@openedev.com>

arch/arm/dts/sun8i-r40-bananapi-m2-ultra.dts

@@ -48,6 +48,7 @@
 	compatible = "sinovoip,bpi-m2-ultra", "allwinner,sun8i-r40";
 
 	aliases {
+		ethernet0 = &gmac;
 		serial0 = &uart0;
 	};
 
@@ -67,3 +68,18 @@
 	pinctrl-0 = <&uart0_pb_pins>;
 	status = "okay";
 };
+
+&gmac {
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac_rgmii_pins>;
+	phy-handle = <&phy1>;
+	phy-mode = "rgmii";
+	status = "okay";
+};
+
+&gmac_mdio {
+	phy1: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <1>;
+	};
+};

configs/Bananapi_M2_Ultra_defconfig

@@ -14,6 +14,10 @@ CONFIG_SPL_I2C_SUPPORT=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_SCSI_AHCI=y
 CONFIG_AXP_DLDO4_VOLT=2500
+CONFIG_AXP_ALDO2_VOLT=2500
 CONFIG_AXP_ELDO3_VOLT=1200
 CONFIG_SCSI=y
 CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y
+CONFIG_SUN8I_EMAC=y
+CONFIG_RGMII=y
+CONFIG_MACPWR="PA17"