net/sched/sch_hfsc.c: initialize parent's cl_cfmin properly in init_vf()

This patch fixes init_vf() function, so on each new backlog period parent's
cl_cfmin is properly updated (including further propgation towards the root),
even if the activated leaf has no upperlimit curve defined.
Signed-off-by: NMichal Soltys <soltys@ziu.info>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/sch_hfsc.c

@@ -761,8 +761,8 @@ init_vf(struct hfsc_class *cl, unsigned int len)
 		if (f != cl->cl_f) {
 			cl->cl_f = f;
 			cftree_update(cl);
-			update_cfmin(cl->cl_parent);
 		}
+		update_cfmin(cl->cl_parent);
 	}
 }