[PATCH V2] imx: Add support for i.MX8MN Beacon EmbeddedWorks devkit.

[Peng Fan]

> Subject: [PATCH V2] imx: Add support for i.MX8MN Beacon EmbeddedWorks
> devkit.
> 
> Beacon EmbeddedWorks is releasing a devkit based on the i.MX8M
> Nano SoC consisting of baseboard + SOM.
> 
> The kit is based on the same design as the Beacon dev kit with
> the i.MX8M Mini.
> 
> Signed-off-by: Adam Ford <aford173 at gmail.com>

Reviewed-by: Peng Fan <peng.fan at nxp.com>

> ---
> V2:  Update README file to reference newer DDR firmware