sunvdc: remove unnecessary oom message

Fixes scripts/checkpatch.pl warning:
WARNING: Possible unnecessary 'out of memory' message

Remove it can help us save a bit of memory.
Signed-off-by: NZhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

drivers/block/sunvdc.c

@@ -1001,9 +1001,8 @@ static int vdc_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	}
 
 	port = kzalloc(sizeof(*port), GFP_KERNEL);
-	err = -ENOMEM;
 	if (!port) {
-		printk(KERN_ERR PFX "Cannot allocate vdc_port.\n");
+		err = -ENOMEM;
 		goto err_out_release_mdesc;
 	}