scsi: core: Fix kernel doc for scsi_track_queue_full()

Sphinx reports indentation warning on scsi_track_queue_full() return
values:

Documentation/driver-api/scsi:101: ./drivers/scsi/scsi.c:247: ERROR: Unexpected indentation. [docutils]

Fix the warning by making the return values listing a bullet list.

Fixes: eb44820c28bc ("[SCSI] Add Documentation and integrate into docbook build")
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Bagas Sanjaya <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/scsi.c

···
  * 		specific SCSI device to determine if and when there is a
  * 		need to adjust the queue depth on the device.
  *
- * Returns:	0 - No change needed, >0 - Adjust queue depth to this new depth,
- * 		-1 - Drop back to untagged operation using host->cmd_per_lun
- * 			as the untagged command depth
+ * Returns:
+ * * 0 - No change needed
+ * * >0 - Adjust queue depth to this new depth,
+ * * -1 - Drop back to untagged operation using host->cmd_per_lun as the
+ *   untagged command depth
  *
  * Lock Status:	None held on entry
  *