ARM: dts: imx6q-apalis: Move parallel rgb interface to SoM dtsi

Move all Parallel RGB-related nodes to the module level and disable it by
default. This allows to enable it in an overlay per the current system
configuration.

Update SPDX-License spelling to latest convention.
Update Copyright year.

Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>