VSOCK: Use kvfree()

Use kvfree() instead of open-coding it.
Signed-off-by: NWei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

drivers/vhost/vsock.c

@@ -434,10 +434,7 @@ static int vhost_vsock_stop(struct vhost_vsock *vsock)
 
 static void vhost_vsock_free(struct vhost_vsock *vsock)
 {
-	if (is_vmalloc_addr(vsock))
-		vfree(vsock);
-	else
-		kfree(vsock);
+	kvfree(vsock);
 }
 
 static int vhost_vsock_dev_open(struct inode *inode, struct file *file)