tcphpts: Export tcp_hpts symbols required by tcp_bbr and tcp_rack modules

[rupeshpilania_gmail.com]

Summary

Fix missing symbol errors when loading tcp_bbr.ko and tcp_rack.ko by
exporting the required tcp_hpts functions from the tcphpts module.

PR: 291272

Test Plan

set debug.link_elf_leak_locals=0 and debug.link_elf_obj_leak_locals=0
kldload tcp_bbr.ko

kldload tcp_rack.ko
Both load successfully now.

[rupeshpilania_gmail.com]

PR291272-test-logs.txt1 KBDownload

Attached test logs for PR: 291272

[ziaee]

+ jhb, kib because this is a symbol visibility issue.

Rupesh, your log attachment is restricted. Please share them.

[ziaee]

PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291272

[rupeshpilania_gmail.com]

In D54046#1234821, @ziaee wrote:

+ jhb, kib because this is a symbol visibility issue.

Rupesh, your log attachment is restricted. Please share them.

Done — the attachment is now public.