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>