arm64: dts: imx8mm: Add support for Data Modul i.MX8M Mini eDM SBC

arm64: dts: imx8mm: Add support for Data Modul i.MX8M Mini eDM SBC

Add support for Data Modul i.MX8M Mini eDM SBC board. This is an
evaluation board for various custom display units. Currently
supported are serial console, ethernet, eMMC, SD, PCIe, SPI NOR,
USB host and USB OTG.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: NXP Linux Team <linux-imx@nxp.com>
To: linux-arm-kernel@lists.infradead.org
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>