RDMA/cxgb3: Timeout condition is never true

This is a static checker fix.  "count" is unsigned so it's never -1.
Since "count" is 16 bits and the addition operation is implicitly
casted to int then there is no wrapping here.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NSteve Wise <swise@opengridcomputing.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

drivers/infiniband/hw/cxgb3/iwch_qp.c

@@ -883,7 +883,8 @@ u16 iwch_rqes_posted(struct iwch_qp *qhp)
 {
 	union t3_wr *wqe = qhp->wq.queue;
 	u16 count = 0;
-	while ((count+1) != 0 && fw_riwrh_opcode((struct fw_riwrh *)wqe) == T3_WR_RCV) {
+
+	while (count < USHRT_MAX && fw_riwrh_opcode((struct fw_riwrh *)wqe) == T3_WR_RCV) {
 		count++;
 		wqe++;
 	}