CONFIG_ARCH_MULTI_V4 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

ARMv4 based platforms (FA526)

configname: CONFIG_ARCH_MULTI_V4

Linux Kernel Configuration
└─>System Type
└─>Multiple platform selection
└─>ARMv4 based platforms (FA526)
In linux kernel since version 3.1 (release Date: 2011-10-24)  

depends
CONFIG_ARCH_MULTIPLATFORM
NOT CONFIG_ARCH_MULTI_V6_V7 or CONFIG_MMU or CONFIG_LLD_VERSIONCONFIG_160000 or  NOT CONFIG_LD_IS_LLD