ARM64: dts: amlogic: Reorder copyrights for meson-gx

meson-gx.dtsi was directly derived from meson-gxbb.dtsi, so keep the
copyrights in chronological order to not give a wrong impression.

Fixes: c328666d ("ARM64: dts: amlogic: Add Meson GX dtsi from GXBB")
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>