For the NVMe device given, retrieves the log page directory which contains the list of
log page IDs supported by the drive. The --output-format option will format the output as
specified.
The <device> parameter is mandatory and must be the NVMe character device (ex: /dev/nvme0).
This will only work on WDC devices supporting this feature.
Results for any other device are undefined.
On success it returns the log page directory information, error code otherwise.