CONFIG_ARC_MMU_V4 is not available for thedefaultarchitecture x86.
Result is shown for architecture arc

MMU v4

configname: CONFIG_ARC_MMU_V4

MMU Version
└─>MMU v4
In linux kernel since version 3.10 (release Date: 2013-06-30)  
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is selected by
CONFIG_ARC_PAGE_SIZE_4K
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