This patch adds the offset argument for rootfs partiton so that it's aligned to a 1MiB boundary, instead of using the size of the previous u-boot partition to achieve this. Genimage will make sure no partitions overlap. So we don't need a size argument to limit the size of the u-boot image. Signed-off-by: Dong Wang <wangdong115@foxmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>