When manually writing SPL and u-boot.img to the SD card the rootfs
gets corrupted.
Fix this issue by passing a 1MB offset for the rootfs.
Reported-by: Breno Lima <breno.lima@nxp.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Tested-by: Breno Lima <breno.lima@nxp.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
