arm: dts: update Meson GXBB / Odroid-C2 DT with recent Linux version

As a prerequisite for adding a Meson GX MMC driver update the
Meson GXBB / Odroid-C2 device tree in Uboot with the latest
version from Linux.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>