scsi: core: Set sc_data_direction to DMA_NONE for no-transfer commands

No having the special DMA_NONE logic makes libata rather unhappy.

Link: https://lore.kernel.org/r/20201008200611.1818099-3-hch@lst.de


Fixes: 40b93836 ("scsi: core: Use rq_dma_dir in scsi_setup_cmnd()")
Reported-by: Qian Cai <cai@redhat.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>