CONFIG_HT_PCI is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_HT_PCI.
Result is shown for kernelversion 6.9.9

Support for HT-linked PCI

configname: CONFIG_HT_PCI

Linux Kernel Configuration
└─>Bus options (PCI, PCMCIA, EISA, ISA, TC)
└─>Support for HT-linked PCI
In linux kernel since version 3.15 (release Date: 2014-06-08)  
Loongson family machines use Hyper-Transport bus for inter-core
connection and device connection. The PCI bus is a subordinate
linked at HT. Choose Y for Loongson-3 based machines.