caif_virtio: Remove redundant initialization of variable err

After commit a8c7687b ("caif_virtio: Check that vringh_config is not
null"), the variable err is being initialized with '-EINVAL' that is
meaningless. So remove it.
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/caif/caif_virtio.c

@@ -652,7 +652,7 @@ static int cfv_probe(struct virtio_device *vdev)
 	const char *cfv_netdev_name = "cfvrt";
 	struct net_device *netdev;
 	struct cfv_info *cfv;
-	int err = -EINVAL;
+	int err;
 
 	netdev = alloc_netdev(sizeof(struct cfv_info), cfv_netdev_name,
 			      NET_NAME_UNKNOWN, cfv_netdev_setup);