default or selected kernelversion does not have config value CONFIG_CLKSRC_NOMADIK_MTU_SCHED_CLOCK.
Result is shown for kernelversion 6.9.9

CONFIG_CLKSRC_NOMADIK_MTU_SCHED_CLOCK (not configurable)

configname: CONFIG_CLKSRC_NOMADIK_MTU_SCHED_CLOCK

Linux Kernel Configuration
└─>Device Drivers
└─>Clock Source drivers
└─>CLKSRC_NOMADIK_MTU_SCHED_CLOCK
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Use the Multi Timer Unit as the sched_clock.

depends
CONFIG_CLKSRC_NOMADIK_MTU
CONFIG_GENERIC_CLOCKEVENTS