viommu: Fixup incorrect disk xml issues

[Yingshun]

The disk and scsi controller may enable iommu by default, so update to use the proper disk and controller settings.

Test results: The failed case is caused by a known issue.

 (1/7) type_specific.io-github-autotest-libvirt.vIOMMU.hotplug_device_with_iommu_enabled.virtio_muti_devices.vhost_on.virtio: PASS (78.88 s)
 (2/7) type_specific.io-github-autotest-libvirt.vIOMMU.hotplug_device_with_iommu_enabled.virtio_muti_devices.vhost_on.smmuv3: PASS (81.11 s)
 (3/7) type_specific.io-github-autotest-libvirt.vIOMMU.hotplug_device_with_iommu_enabled.virtio_muti_devices.vhost_off.virtio: PASS (80.84 s)
 (4/7) type_specific.io-github-autotest-libvirt.vIOMMU.hotplug_device_with_iommu_enabled.virtio_muti_devices.vhost_off.smmuv3: PASS (80.47 s)
 (5/7) type_specific.io-github-autotest-libvirt.vIOMMU.hotplug_device_with_iommu_enabled.hostdev_iface.virtio: PASS (86.11 s)
 (6/7) type_specific.io-github-autotest-libvirt.vIOMMU.hotplug_device_with_iommu_enabled.scsi_controller.virtio: PASS (81.51 s)
 (7/7) type_specific.io-github-autotest-libvirt.vIOMMU.hotplug_device_with_iommu_enabled.scsi_controller.smmuv3: PASS (80.42 s)
 (01/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.virtio_muti_devices.vhost_on.virtio: PASS (73.07 s)
 (02/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.virtio_muti_devices.vhost_on.smmuv3: PASS (44.81 s)
 (03/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.virtio_muti_devices.vhost_off.virtio: PASS (44.29 s)
 (04/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.virtio_muti_devices.vhost_off.smmuv3: PASS (44.73 s)
 (05/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.hostdev_iface.virtio: PASS (58.90 s)
 (06/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.scsi_controller.virtio: PASS (43.68 s)
 (07/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.scsi_controller.smmuv3: PASS (51.34 s)
 (08/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.pcie_to_pci_bridge_controller.virtio_non_transitional.virtio: PASS (45.05 s)
 (09/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.pcie_to_pci_bridge_controller.virtio_non_transitional.smmuv3: ERROR: Login timeout expired    (output: 'exceeded 360 s timeout') (385.64 s)
 (10/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.pcie_to_pci_bridge_controller.hostdev_iface.virtio: PASS (60.61 s)
 (11/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.pcie_root_port_from_expander_bus.virtio: PASS (77.67 s)
 (12/12) type_specific.io-github-autotest-libvirt.vIOMMU.iommu_device_settings.pcie_root_port_from_expander_bus.smmuv3: PASS (56.51 s)
RESULTS    : PASS 11 | ERROR 1 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0
JOB HTML   : /var/log/avocado/job-results/job-2024-09-19T06.03-ea671be/results.html
JOB TIME   : 987.20 s