RDMA/nes: Use WARN()

Use WARN() rather than printk() followed by WARN_ON(1), for conciseness.

A simplified version of the semantic patch that makes this transformation
is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression list es;
@@

-printk(
+WARN(1,
  es);
-WARN_ON(1);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

[ Remove extra KERN_ERR from WARN() format.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/nes/nes_mgt.c

@@ -649,11 +649,9 @@ static void nes_chg_qh_handler(struct nes_device *nesdev, struct nes_cqp_request
 	nesqp = qh_chg->nesqp;
 
 	/* Should we handle the bad completion */
-	if (cqp_request->major_code) {
-		printk(KERN_ERR PFX "Invalid cqp_request major_code=0x%x\n",
+	if (cqp_request->major_code)
+		WARN(1, PFX "Invalid cqp_request major_code=0x%x\n",
 		       cqp_request->major_code);
-		WARN_ON(1);
-	}
 
 	switch (nesqp->pau_state) {
 	case PAU_DEL_QH: