default or selected kernelversion does not have config value CONFIG_AGP_I460.
Result is shown for kernelversion 6.9.9

Intel 460GX chipset support

modulename: i460-agp.ko

configname: CONFIG_AGP_I460

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>/dev/agpgart (AGP Support)
└─>Intel 460GX chipset support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option gives you AGP GART support for the Intel 460GX chipset
for IA64 processors.

source code: