arm64: dts: imx8mp-verdin: don't use multiple blank lines

Avoid the following checkpatch warning:

arch/arm/boot/dts/imx8mp-verdin.dtsi:281: check: Please don't use
 multiple blank lines

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>