Android uboot does not even have ext4load command:
Hit Enter or space or Ctrl+C key to stop autoboot -- : 0 Unknown command 'ext4load' - try 'help' Unknown command 'ext4load' - try 'help' kvim#
and thus I cannot boot ArchLinuxArm from micro SD card. @Gouwa please work on this, I can understand that currently two u-boot are needed because of that cache partition for Android, but at least they should be both on same level from feature.
In that HowTo for ArchLinuxArm i need to write that they must use Linux u-boot (one which comes with Ubuntu) as I don’t create FAT partition.