vfio: Also trace event failures in vfio_save_complete_precopy()

vfio_save_complete_precopy() currently returns before doing the trace
event. Change that.

Reviewed-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>

hw/vfio/migration.c

@@ -589,9 +589,6 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque)
 
     qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE);
     ret = qemu_file_get_error(f);
-    if (ret) {
-        return ret;
-    }
 
     trace_vfio_save_complete_precopy(vbasedev->name, ret);