ARM: dts: imx6: Add support for imx6q dmo edmqmx6

Signed-off-by: Silvio F <silvio.fricke@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>