vhost-scsi: Fix typos and formatting in comments and logs

This patch corrects several minor typos and formatting issues.
Changes include:

Fixing misspellings like in comments
- "explict" -> "explicit"
- "infight" -> "inflight",
- "with generate" -> "will generate"

formatting in logs
- Correcting log formatting specifier from "%dd" to "%d"
- Adding a missing space in the sysfs emit string to prevent
  misinterpreted output like "X86_64on ". changing to "X86_64 on "
- Cleaning up stray semicolons in struct definition endings

These changes improve code readability and consistency.
no functionality changes.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Message-Id: <20250611143932.2443796-1-alok.a.tiwari@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>