default or selected kernelversion does not have config value CONFIG_U300_TIMER.
Result is shown for kernelversion 6.9.9
U300 timer driver
modulename: timer-u300.ko
configname: CONFIG_U300_TIMER
Linux Kernel Configuration
└─>Device Drivers
└─>Clock Source drivers
└─>U300 timer driver
In linux kernel since version 4.1 (release Date: 2015-06-21)
Enables support for the U300 timer.