RDMA/cxgb3: Silently ignore close reply after abort.

Remove bad BUG_ON() that can trigger in correct operation from
close_con_rpl().  It is possible to get a close_rpl message on a dead
connection.  The sequence is:

	- host refs ep for close exchange
	- host posts close_req
	- hw posts PEER_ABORT from incoming RST
	- host marks ep DEAD
	- host posts ABORT_RPL and releases ep resources
	- hw posts CLOSE_RPL
	- host derefs ep and ep freed.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/cxgb3/iwch_cm.c

@@ -1650,8 +1650,8 @@ static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
 		release = 1;
 		break;
 	case ABORTING:
-		break;
 	case DEAD:
+		break;
 	default:
 		BUG_ON(1);
 		break;