xen-backend can be plugged/unplugged dynamically when using the
Xen accelerator, so keep the user_creatable flag on the device
class and remove the FIXME comment.

Cc: Juergen Gross <jgross@suse.com>,
Cc: Peter Maydell <peter.maydell@linaro.org>,
Cc: Thomas Huth <thuth@redhat.com>
Cc: sstabellini@kernel.org
Cc: Markus Armbruster <armbru@redhat.com>,
Cc: Marcel Apfelbaum <marcel@redhat.com>,
Cc: Laszlo Ersek <lersek@redhat.com>
Acked-by: Juergen Gross <jgross@suse.com>
Acked-by: Marcel Apfelbaum <marcel@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
Changes series v1 -> v2:
* (New patch added to series)
---
 hw/xen/xen_backend.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
index 67cb4cb9f0..2b91d2d458 100644
--- a/hw/xen/xen_backend.c
+++ b/hw/xen/xen_backend.c
@@ -619,10 +619,7 @@ static void xendev_class_init(ObjectClass *klass, void *data)
 
     dc->props = xendev_properties;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
-    /*
-     * FIXME: Set only because we are not sure yet if this device
-     * will be outside the q35 sysbus whitelist.
-     */
+    /* xen-backend devices can be plugged/unplugged dynamically */
     dc->user_creatable = true;
 }
 
-- 
2.11.0.259.g40922b1