lnvm: introduce chunk-log command for chunk info

lnvm: introduce chunk-log command for chunk info

To retrieve the chunk information from the nvme namespae for the given
OCSSD, we can just do like:
	nvme lnvm chunk-log /dev/nvme0n1 --output-format=normal

This will calculate the data length from the geometry data structure
which might be retrieved by a Geometry command(Identity for 1.2 spec.).
Then it will request get log page API for 1.3 NVMe spec to get the
entries which indicate chunk information.

Cc: Keith Busch <kbusch@kernel.org>
Cc: Matias Bjorling <mb@lightnvm.io>
Cc: Javier González <javier@javigon.com>
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>