scsi-bus: Add PERSISTENT_RESERVE_OUT SCSIRequest->cmd.mode setup

This patch updates hw/scsi-bus.c to add the PERSISTENT_RESERVE_OUT cdb
case in scsi_req_xfer_mode() to set SCSI_XFER_TO_DEV for outgoing WRITE data.

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

hw/scsi-bus.c

diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 055a94d..3575ba3 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -306,6 +306,7 @@
     case MEDIUM_SCAN:
     case SEND_VOLUME_TAG:
     case WRITE_LONG_2:
+    case PERSISTENT_RESERVE_OUT:
         req->cmd.mode = SCSI_XFER_TO_DEV;
         break;
     default: