ARM: am335x: phyCORE-AM335x: Create new dts for MLO
Use a mlo device tree with all bootable devices disabled.
The bootsource is checked in the board file and only the
needed device is enabled and registered.
Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>