ARM: dts: imx6ull-dhcor: Add Marantec maveo box

Add support for Marantec maveo box. The system is used to get a
smart conntection to a door drive. It has USB, WiFi, Bluetooth,
Zigbee and NFC interfaces. The core of this system is a soldered
i.MX6ULL DHCOR SoM from DH electronics.

Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>