arm: dts: imx8dx: add lpuart1, lpuart2, lpuart3

Add support for lpuart1, lpuart2 and lpuart3.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
1 file changed