sun50i: a64: Add A64-OLinuXino initial support

OLimex A64-OLinuXino is an open-source hardware board
using the Allwinner A64 SOC.

OLimex A64-OLinuXino has
- A64 Quad-core Cortex-A53 64bit
- 1GB or 2GB RAM DDR3L @ 672Mhz
- microSD slot and 4/8/16GB eMMC
- Debug TTL UART
- HDMI
- LCD
- IR receiver
- 5V DC power supply

Tested-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/configs/a64-olinuxino_defconfig b/configs/a64-olinuxino_defconfig
new file mode 100644
index 0000000..14f2c3d
--- /dev/null
+++ b/configs/a64-olinuxino_defconfig
@@ -0,0 +1,15 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_MACH_SUN50I=y
+CONFIG_RESERVE_ALLWINNER_BOOT0_HEADER=y
+CONFIG_DEFAULT_DEVICE_TREE="sun50i-a64-olinuxino"
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SPL=y
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_FPGA is not set
+# CONFIG_SPL_DOS_PARTITION is not set
+# CONFIG_SPL_ISO_PARTITION is not set
+# CONFIG_SPL_EFI_PARTITION is not set
+CONFIG_SUN8I_EMAC=y
+CONFIG_USB_EHCI_HCD=y