MFC r367464:
The ioctl() calls using FIONREAD, FIONWRITE, FIONSPACE, and SIOCATMARK
access the socket send or receive buffer. This is not possible for
listening sockets since r319722.
Because send()/recv() calls fail on listening sockets, fail also ioctl()
indicating EINVAL.

PR: 250366
Reported by: Yong-Hao Zou
Reviewed by: glebius, rscheff
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D26897