sunxi: Add support for Orange Pi 3

dts file is taken from Linux 5.11-rc1 tag.

The Bluetooth controller of this device ships with a default address,
use the new CONFIG_FIXUP_BDADDR option to fix it up.

Signed-off-by: Andre Heider <a.heider@gmail.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
[Updated OrangePi 3 DT, rebase and config update]
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index 7a73a0b..46db701 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -385,6 +385,11 @@
 S:	Maintained
 F:	configs/teres_i_defconfig
 
+ORANGEPI 3 BOARD
+M:	Andre Heider <a.heider@gmail.com>
+S:	Maintained
+F:	configs/orangepi_3_defconfig
+
 ORANGEPI LITE2 BOARD
 M:	Jagan Teki <jagan@amarulasolutions.com>
 S:	Maintained