default or selected kernelversion does not have config value CONFIG_MOXART_TIMER.
Result is shown for kernelversion 6.4.14

Moxart timer driver

modulename: moxart_timer.ko

configname: CONFIG_MOXART_TIMER

Linux Kernel Configuration
└─>Device Drivers
└─>Clock Source drivers
└─>Moxart timer driver
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Enables support for the Moxart timer.

source code:

depends
CONFIG_GENERIC_CLOCKEVENTS
NOT CONFIG_ARCH_USES_GETTIMEOFFSET