CONFIG_ARCH_MULTI_V7 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

ARMv7 based platforms (Cortex-A, PJ4, Krait)

configname: CONFIG_ARCH_MULTI_V7

Linux Kernel Configuration
└─>System Type
└─>Multiple platform selection
└─>ARMv7 based platforms (Cortex-A, PJ4, Krait)
In linux kernel since version 3.1 (release Date: 2011-10-24)