default or selected kernelversion does not have config value CONFIG_VIDEO_SAA7191.
Result is shown for kernelversion 6.5.1

Philips SAA7191 video decoder

modulename: saa7191.ko

configname: CONFIG_VIDEO_SAA7191

Linux Kernel Configuration
└─>Device Drivers
└─>Multimedia support
└─>Encoders, decoders, sensors and other helper chips
└─>I2C support
└─>Philips SAA7191 video decoder
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Support for the Philips SAA7191 video decoder.

To compile this driver as a module, choose M here: the
module will be called saa7191.

source code: