[Merge] ~xypron/livecd-rootfs:visionfive_2 into livecd-rootfs:ubuntu/master

[Heinrich Schuchardt]

The partioning scheme was designed to allow the vendor U-Boot to be placed on the SD-card. But as a U-Boot comes preinstalled on the SPI flash we don't populate those partitions currently.
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https://code.launchpad.net/~xypron/livecd-rootfs/+git/livecd-rootfs/+merge/440409
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