base: Make ListenSocket::listen(int port) protected.

Stop making the old API available.

Change-Id: I70752d081cb572a8ae5bf396d2ea43ecc7be1e9c
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/69161
Maintainer: Gabe Black <gabe.black@gmail.com>
Reviewed-by: Yu-hsin Wang <yuhsingw@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed