IB/mlx4: Remove unneeded NULL check

NULL check for kfree is unnecessary, remove it.

Fixes: b42dde478b ("IB/mlx4: Rework special QP creation error path")
Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/mlx4/qp.c

@@ -1211,10 +1211,10 @@ err_db:
 		mlx4_db_free(dev->dev, &qp->db);
 
 err:
-	if (sqp)
-		kfree(sqp);
-	else if (!*caller_qp)
+	if (!sqp && !*caller_qp)
 		kfree(qp);
+	kfree(sqp);
+
 	return err;
 }