scsi: zfcp: Fix an outdated comment for zfcp_qdio_send()

scsi: zfcp: Fix an outdated comment for zfcp_qdio_send()

zfcp no longer uses the qdio PCI flag, update the comment.

Link: https://lore.kernel.org/r/6717c26fc986bff8776d110e27c199b523684c63.1593780621.git.bblock@linux.ibm.com
Fixes: 21ddaa53f92d ("[SCSI] zfcp: Remove PCI flag")
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: Fedor Loshakov <loshakov@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>