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>

drivers/usb/storage/uas.c

@@ -879,6 +879,7 @@ static struct scsi_host_template uas_host_template = {
 	.this_id = -1,
 	.sg_tablesize = SG_NONE,
 	.skip_settle_delay = 1,
+	.use_clustering = DISABLE_CLUSTERING,
 };
 
 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \