fdc: Remove user_creatable flag from sysbus-fdc & SUNW,fdtwo

sysbus-fdc and SUNW,fdtwo devices need IRQs to be wired and mmio
to be mapped, and can't be used with -device. Unset
user_creatable on their device classes.

Cc: John Snow <jsnow@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: qemu-block@nongnu.org
Cc: Thomas Huth <thuth@redhat.com>
Acked-by: NJohn Snow <jsnow@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Acked-by: NMarcel Apfelbaum <marcel@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Message-Id: <20170503203604.31462-6-ehabkost@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>

hw/block/fdc.c

@@ -2880,11 +2880,6 @@ static void sysbus_fdc_class_init(ObjectClass *klass, void *data)
 
     dc->props = sysbus_fdc_properties;
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
-    /*
-     * FIXME: Set only because we are not sure yet if this device
-     * will be outside the q35 sysbus whitelist.
-     */
-    dc->user_creatable = true;
 }
 
 static const TypeInfo sysbus_fdc_info = {
@@ -2911,11 +2906,6 @@ static void sun4m_fdc_class_init(ObjectClass *klass, void *data)
 
     dc->props = sun4m_fdc_properties;
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
-    /*
-     * FIXME: Set only because we are not sure yet if this device
-     * will be outside the q35 sysbus whitelist.
-     */
-    dc->user_creatable = true;
 }
 
 static const TypeInfo sun4m_fdc_info = {