Add generated scsi_devinfo_tbl.c into .gitignore.

Fixes: 345e2960 ("scsi: scsi: Export blacklist flags to sysfs")
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>