s390x: sort some devices into categories

Add missing categorizations for some s390x devices:
- zpci device -> misc
- 3270 -> display
- vfio-ccw -> misc
Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Signed-off-by: NCornelia Huck <cohuck@redhat.com>

hw/s390x/3270-ccw.c

@@ -160,6 +160,7 @@ static void emulated_ccw_3270_class_init(ObjectClass *klass, void *data)
     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
     dc->realize = emulated_ccw_3270_realize;
     dc->hotpluggable = false;
+    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 }
 
 static const TypeInfo emulated_ccw_3270_info = {

hw/s390x/s390-pci-bus.c

@@ -1032,6 +1032,7 @@ static void s390_pci_device_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->desc = "zpci device";
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     dc->reset = s390_pci_device_reset;
     dc->bus_type = TYPE_S390_PCI_BUS;
     dc->realize = s390_pci_device_realize;

hw/vfio/ccw.c

@@ -413,6 +413,7 @@ static void vfio_ccw_class_init(ObjectClass *klass, void *data)
     dc->props = vfio_ccw_properties;
     dc->vmsd = &vfio_ccw_vmstate;
     dc->desc = "VFIO-based subchannel assignment";
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     dc->realize = vfio_ccw_realize;
     dc->unrealize = vfio_ccw_unrealize;
     dc->reset = vfio_ccw_reset;