imx: kontron-sl-mx8mm: Enable bootaux command

Enable the bootaux command in order to be able to load a
binary into the M4 core when needed.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
1 file changed