arm64: dts: imx8mm: Add display pipeline components

Add LCDIF scanout engine and DSIM bridge nodes for i.MX8M Mini.
This makes the DSI display pipeline available on this SoC.

Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>