sunxi: Add Pine64+ support

The Pine64+ is a system based on the Allwinner A64 SoC. It is capable of
running AArch64 code and thus is the first of its kind for the sunxi target.

This patch adds a defconfig and device tree chunks for it.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
[agraf: Change patch description]
Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index 5f2f4fe..430d770 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -63,6 +63,8 @@
 F:	configs/q8_a33_tablet_1024x600_defconfig
 F:	include/configs/sun9i.h
 F:	configs/Merrii_A80_Optimus_defconfig
+F:	include/configs/sun50i.h
+F:	configs/pine64_plus_defconfig
 
 A20-OLIMEX-SOM-EVB BOARD
 M:	Marcus Cooper <codekipper@gmail.com>