sunxi: h3: Add initial ZeroPi support

ZeroPi is a new board of high performance with low cost
designed by FriendlyElec., using the Allwinner H3 SOC.

ZeroPi features
- Allwinner H3, Quad-core Cortex-A7@1.2GHz
- 256MB/512MB DDR3 RAM
- microsd slot
- 10/100/1000Mbps Ethernet
- Debug Serial Port
- DC 5V/2A power-supply

Signed-off-by: Yu-Tung Chang <mtwget@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/configs/zeropi_defconfig b/configs/zeropi_defconfig
new file mode 100644
index 0000000..11f3715
--- /dev/null
+++ b/configs/zeropi_defconfig
@@ -0,0 +1,13 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_DEFAULT_DEVICE_TREE="sun8i-h3-zeropi"
+CONFIG_SPL=y
+CONFIG_MACH_SUN8I_H3=y
+CONFIG_DRAM_CLK=408
+CONFIG_MACPWR="PD6"
+# CONFIG_VIDEO_DE2 is not set
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_CONSOLE_MUX=y
+CONFIG_SUN8I_EMAC=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_OHCI_HCD=y