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

CONFIG_COLDFIRE_PIT_TIMER (not configurable)

modulename: pit.ko

configname: CONFIG_COLDFIRE_PIT_TIMER

Linux Kernel Configuration
└─>COLDFIRE_PIT_TIMER
In linux kernel since version 5.2 (release Date: 2019-07-07)  
source code:
arch/m68k/coldfire/pit.c
depends
CONFIG_COLDFIRE