scsi: remove scsi_get_tag_type

Both remaining users are better of just checking sdev->simple_tags
directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com
Reviewed-by: Hannes Reinecke <hare@suse.de>

diff --cc drivers/scsi/53c700.c
Simple merge

diff --cc drivers/scsi/ipr.c
Simple merge

diff --cc include/scsi/scsi_tcq.h
Simple merge