NAS-132315 / 25.04 / fix minor cosmetic ixnvdimm output

[yocalebo]

Noticed while working on an unrelated PR. Noticed ixnvdimm output looked like this

==================== /dev/nmem0 ====================Module:
vendor: ce01 device: 4e39 revision: 34
subvendor: c180 subdevice: 4331 subrevision: 01
serial: 10680000

With the fix in place, it looks like this

==================== /dev/nmem0 ====================
Module:
vendor: ce01 device: 4e39 revision: 34
subvendor: c180 subdevice: 4331 subrevision: 01
serial: 10680000

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/NAS-132315

[bugclerk]

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