nvme: pad fake subsys NQN vid and ssvid with zeros

nvme: pad fake subsys NQN vid and ssvid with zeros

BugLink: https://bugs.launchpad.net/bugs/1811755
We need to preserve the leading zeros in the vid and ssvid when generating
a unique NQN. Truncating these may lead to naming collisions.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
(cherry picked from commit 3da584f57133e51aeb84aaefae5e3d69531a1e4f)
Signed-off-by: Anthony Wong <anthony.wong@canonical.com>
Acked-by: Khalid Elmously <khalid.elmously@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>