sunxi: Enable emac on H3 orangepi boards

The Orange Pi 2 and Orange Pi Plus also come with ethernet, enable
support for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/configs/orangepi_2_defconfig b/configs/orangepi_2_defconfig
index 8b1082c..e2f6a83 100644
--- a/configs/orangepi_2_defconfig
+++ b/configs/orangepi_2_defconfig
@@ -15,3 +15,4 @@
 # CONFIG_CMD_FPGA is not set
 CONFIG_SY8106A_POWER=y
 CONFIG_USB_EHCI_HCD=y
+CONFIG_SUN8I_EMAC=y