Use sfdisk to get GPT partition by name as partition names are not
known by the kernel if added via partx.
Make sure physical volume names are unique, if possible correlate
with the disks serial number and/or card's cid.
mkf2fs apparently returns 134 even in case format succeeded, so don't
fail in that case (this fixes rw volumes large enough for F2FS to be
selected by the lvm scripts of uvol).

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

uvol is a wrapper-script which allows automated handling of storage
volumes. uvol currently comes with backend support for LVM2 and UBI,
covering practically all options for storage large enough to be
managed (NAND, SPI-NAND, eMMC, SATA, NVME, virtio-blk, ...).

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Instead of just appending the driver serial including the '0x' prefix,
use '-' prefix instead to make it more readable.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

The 'autopart' package is intended for devices with rather large
block device storage (ie. SATA or MMC).
It automatically allocates the free space on the block device used
for booting into an LVM2 physical volume.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>