xfrm: Kill XFRM_LOOKUP_WAIT flag.

This can be determined from the flow flags instead.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 7846265..23d2050 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2732,9 +2732,7 @@
 			flp->fl4_src = (*rp)->rt_src;
 		if (!flp->fl4_dst)
 			flp->fl4_dst = (*rp)->rt_dst;
-		err = __xfrm_lookup(net, (struct dst_entry **)rp, flp, sk,
-				    ((flp->flags & FLOWI_FLAG_CAN_SLEEP) ?
-				     XFRM_LOOKUP_WAIT : 0));
+		err = __xfrm_lookup(net, (struct dst_entry **)rp, flp, sk, 0);
 		if (err == -EREMOTE)
 			err = ipv4_dst_blackhole(net, rp, flp);