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

Silicom devices


Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Network device support
└─>Silicom devices
In linux kernel since version 3.1 (release Date: 2011-10-24)  
If you have a network card (Ethernet) belonging to this class,
say Y.

Note that the answer to this question does not directly affect
the kernel: saying N will just case the configurator to skip all
the questions regarding Silicom chipsets. If you say Y, you will be asked
for your specific chipset/driver in the following questions.