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

Medfile HSU serial console support

configname: CONFIG_SERIAL_MFD_HSU_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Medfile HSU serial console support
In linux kernel since version 2.6.36 (release Date: 2010-10-20)