sun50i: a64: Add initial Orangepi Win/WinPlus support

Orangepi Win/WinPlus is an open-source single-board computer
using the Allwinner A64 SOC.

A64 Orangepi Win/WinPlus has
- A64 Quad-core Cortex-A53 64bit
- 1GB(Win)/2GB(Win Plus) DDR3 SDRAM
- Debug TTL UART
- Four USB 2.0
- HDMI
- LCD
- Audio and MIC
- Wifi + BT
- IR receiver
- 5V DC power supply

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index 314aee3..77d8d17 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -267,6 +267,11 @@
 S:	Maintained
 F:	configs/Nintendo_NES_Classic_Edition_defconfig
 
+ORANGEPI WIN/WIN PLUS BOARD
+M:	Jagan Teki <jagan@amarulasolutions.com>
+S:	Maintained
+F:	configs/orangepi_win_defconfig
+
 ORANGEPI ZERO BOARD
 M:	Icenowy Zheng <icenowy@aosc.xyz>
 S:	Maintained