sunxi: OrangePi Zero 2: Enable Ethernet

With the fixes to the sun8i-emac driver, we can now enable Ethernet
support on the OrangePi Zero2.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
diff --git a/configs/orangepi_zero2_defconfig b/configs/orangepi_zero2_defconfig
index 0c20b5f..5af964b 100644
--- a/configs/orangepi_zero2_defconfig
+++ b/configs/orangepi_zero2_defconfig
@@ -11,3 +11,5 @@
 CONFIG_DEFAULT_DEVICE_TREE="sun50i-h616-orangepi-zero2"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL_I2C_SUPPORT=y
+CONFIG_PHY_REALTEK=y
+CONFIG_SUN8I_EMAC=y