CONFIG_COLDFIRE_SLTIMERS is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

CONFIG_COLDFIRE_SLTIMERS (not configurable)

modulename: sltimers.ko

configname: CONFIG_COLDFIRE_SLTIMERS

Linux Kernel Configuration
└─>COLDFIRE_SLTIMERS
In linux kernel since version 5.2 (release Date: 2019-07-07)  
source code:
arch/m68k/coldfire/sltimers.c
selects
CONFIG_LEGACY_TIMER_TICK

depends
CONFIG_COLDFIRE