default or selected kernelversion does not have config value CONFIG_UNISYS_CHANNELSTUB.
Result is shown for kernelversion 6.4.14
Unisys channelstub driver
modulename: visorchannelstub.ko
configname: CONFIG_UNISYS_CHANNELSTUB
Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Unisys SPAR driver support
└─>Unisys channelstub driver
In linux kernel since version 3.15 (release Date: 2014-06-08)
If you say Y here, you will enable the Unisys channels driver.