RDMA/cxgb4: Use uninitialized_var()

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/cxgb4/cq.c

@@ -672,7 +672,7 @@ skip_cqe:
 static int c4iw_poll_cq_one(struct c4iw_cq *chp, struct ib_wc *wc)
 {
 	struct c4iw_qp *qhp = NULL;
-	struct t4_cqe cqe = {0, 0}, *rd_cqe;
+	struct t4_cqe uninitialized_var(cqe), *rd_cqe;
 	struct t4_wq *wq;
 	u32 credit = 0;
 	u8 cqe_flushed;