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/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 8da32d8..21a8103 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -336,6 +336,7 @@
 dtb-$(CONFIG_MACH_SUN50I) += \
 	sun50i-a64-bananapi-m64.dtb \
 	sun50i-a64-nanopi-a64.dtb \
+	sun50i-a64-olinuxino.dtb \
 	sun50i-a64-orangepi-win.dtb \
 	sun50i-a64-pine64-plus.dtb \
 	sun50i-a64-pine64.dtb