ipv6: Check RTF_LOCAL on rt->rt6i_flags instead of rt->dst.flags

In my earlier commit:
653437d02f1f ("ipv6: Stop /128 route from disappearing after pmtu update"),
there was a horrible typo.  Instead of checking RTF_LOCAL on
rt->rt6i_flags, it was checked on rt->dst.flags.  This patch fixes
it.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Hajime Tazaki <tazaki@sfc.wide.ad.jp>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/route.c

@@ -920,7 +920,7 @@ redo_rt6_select:
 
 	if (!(rt->rt6i_flags & (RTF_NONEXTHOP | RTF_GATEWAY)))
 		nrt = rt6_alloc_cow(rt, &fl6->daddr, &fl6->saddr);
-	else if (!(rt->dst.flags & DST_HOST) || !(rt->dst.flags & RTF_LOCAL))
+	else if (!(rt->dst.flags & DST_HOST) || !(rt->rt6i_flags & RTF_LOCAL))
 		nrt = rt6_alloc_clone(rt, &fl6->daddr);
 	else
 		goto out2;