ARM: dts: imx6q-apalis: Add ov5640 mipi csi camera

The Apalis iMX6 modules allow connecting a mipi-csi video input.
Add support for our OV5640 camera module but have it disabled.
This allows to enable it in an overlay per the current system
configuration.

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>