sunxi: Add suport for A83T based Banana-pi M3 Board

Add dts and defconfig for Banana-pi M3 board.

It has 2G LPDDR3, UART, ethernet, USB, HDMI, USB Sata, MIPI DSI,
mic, AP6212 Wifi, etc on it.
It is paired with AXP813 PMIC which is almost same as AXP818.

Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
[hdegoede@redhat.com: rename to Sinovoip_BPI_M3_defconfig/sun8i-a83t-sinovoip-bpi-m3.dts]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index 131c341..739b6fd 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -183,6 +183,11 @@
 F:	configs/Sinlinx_SinA33_defconfig
 W:	http://linux-sunxi.org/Sinlinx_SinA33
 
+SINOVOIP BPI M3 A83T BOARD
+M:	VishnuPatekar <vishnupatekar0510@gmail.com>
+S:	Maintained
+F:	configs/Sinovoip_BPI_M3_defconfig
+
 WEXLER-TAB7200 BOARD
 M:	Aleksei Mamlin <mamlinav@gmail.com>
 S:	Maintained