scsi: cxlflash: Setup OCXL transaction layer

The first function of the link needs to configure the transaction layer
between the host and device. This is accomplished by a call to the OCXL
provider services.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>