CONFIG_ARCH_MULTI_V4T is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

ARMv4T based platforms (ARM720T, ARM920T, ...)

configname: CONFIG_ARCH_MULTI_V4T

Linux Kernel Configuration
└─>Platform selection
└─>ARMv4T based platforms (ARM720T, ARM920T, ...)
In linux kernel since version 3.1 (release Date: 2011-10-24)