default or selected kernelversion does not have config value CONFIG_FB_IGA.
Result is shown for kernelversion 6.7-rc3

IGA 168x display support

modulename: igafb.ko

configname: CONFIG_FB_IGA

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Frame buffer Devices
└─>Support for frame buffer devices
└─>IGA 168x display support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This is the framebuffer device for the INTERGRAPHICS 1680 and
successor frame buffer cards.

source code: