nvme: update list-ns nsid option

nvme: update list-ns nsid option

This commit updates the optional nsid argument to define the wanted
nsid for start, instead of starting from nsid + 1. E.g. in case we've
wanted to get the list of namespaces starting from 1, before this
commit, we used the "--namespace-id=0" option. Nsid 0 is not valid in
NVMe spec, thus change it to start counting from the given nsid.

Reviewed-by: Minwoo Im <minwoo.im@samsung.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>