linux-imx

scsi: make sure all drivers set the use_clustering flag

A few drivers were not setting the use_clustering flag at all and thus
default to disable.  Fix them up to explicitly set this field in
preparation for additional cleanups.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>