CONFIG_KVM_ARM_TIMER is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

KVM support for Architected Timers

configname: CONFIG_KVM_ARM_TIMER

Linux Kernel Configuration
└─>Virtualization
└─>KVM support for Architected Timers
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Adds support for the Architected Timers in virtual machines