创建loongarch虚拟机时如果存在scsi设备，如cdrom，则默认创建virtio-scsi控制器。
git checkout openEuler-22.03-LTS
git pull https://gitee.com/loongarch-kvm/virt-manager_Euler.git openEuler-22.03-LTS
git push origin openEuler-22.03-LTS
