scsi: spi: Have midlayer retry spi_execute() UAs

This has spi_execute() have the SCSI midlayer retry UAs instead of driving
them.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20240123002220.129141-9-michael.christie@oracle.com


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