Previous patch Removed 'x-' prefix from 'x-flts' property. Opportunistically, this patch does s/flts/fsts for property name in order to better align with newer spec since revision 3.4 which changed terminology from "First-level" to "First-stage". Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20260513064227.2304854-3-zhenzhong.duan@intel.com>