If HAOS on Yellow is booted for the first time with NVMe data disk present, it
should be preferred over the empty eMMC data partition. This will ease
reinstall of the system and migration from CM4 to CM5. All other data disks
(e.g. if a USB drive is used for them) are still treated as before, requiring
manual adoption using the Supervisor repair.
* Deactivate any external data disk device on first boot (#2390)
* Use lsblk to determine the underlying device file
Comparing major number is not reliable, e.g. virtio disks have the same
major number despite being different devices. Use lsblk to find the
underlying device, and compare the device name instead.
