nvme-cli spdk plugin

[Daniel Wagner]

There is a PR [1] pending, adding a spdk plugin for nvme-cli. The
problem this new plugin tries to solve is, that with the recent change
to use sysfs only for discovering the nvme subystem, nvme-cli
lost support for spdk.

My question is, should we have a special plugin for 'list' and
'list-subsystem' or should we try to get this somehow integrated into
the existing code? So that 'list' just works?

Obviously, it would be nice if we could discover the spdk devices via
sysfs.

Thoughts?

https://github.com/linux-nvme/nvme-cli/pull/2295