[RHEL8] kvm guest failed to boot from cdrom drive on ppc64le

Issue

• kvm guest failed to boot from cdrom drive on ppc64le
• Installation failed with following errors

# virt-install --name demo-guest5 --memory 2048 --vcpus 2 --disk size=15 --os-variant rhel8.0 --location /var/tmp/RHEL-8.0-20181113.1-ppc64le-dvd1.iso --nographics --extra-args='console=ttyS0'

Starting install...
Retrieving file .treeinfo...                                                                                                                                           | 1.4 kB  00:00:00    
Retrieving file vmlinuz...                                                                                                                                             |  22 MB  00:00:00    
Retrieving file initrd.img...      
.
.
.
Domain creation completed.
Restarting guest.
Connected to domain demo-guest5
Escape character is ^]
Populating /vdevice methods
Populating /vdevice/vty@30000000
Populating /vdevice/nvram@71000000
Populating /pci@800000020000000
                     00 0800 (D) : 1af4 1000    virtio [ net ]
                     00 1000 (D) : 1b36 000d    serial bus [ usb-xhci ]
                     00 1800 (D) : 1af4 1004    virtio [ scsi ]
Populating /pci@800000020000000/scsi@3
       SCSI: Looking for devices
          100000000000000 CD-ROM   : "QEMU     QEMU CD-ROM      2.5+"
                     00 2000 (D) : 1af4 1003    virtio [ serial ]
                     00 2800 (D) : 1af4 1001    virtio [ block ]
                     00 3000 (D) : 1af4 1002    unknown-legacy-device*
                     00 3800 (D) : 1af4 1005    unknown-legacy-device*
No NVRAM common partition, re-initializing...
Scanning USB 
  XHCI: Initializing
Using default console: /vdevice/vty@30000000

  Welcome to Open Firmware

  Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
  This program and the accompanying materials are made available
  under the terms of the BSD License available at
  http://www.opensource.org/licenses/bsd-license.php


Trying to load:  from: /pci@800000020000000/scsi@5 ... 
E3404: Not a bootable device!

E3407: Load failed

  Type 'boot' and press return to continue booting the system.
  Type 'reset-all' and press return to reboot the system.


Ready! 
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