CONFIG_CPU_MIPS32_3_5_FEATURES is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
MIPS32 Release 3.5 Features
configname: CONFIG_CPU_MIPS32_3_5_FEATURES
Linux Kernel Configuration
└─>CPU selection
└─>MIPS32 Release 3.5 Features
In linux kernel since version 3.10 (release Date: 2013-06-30)
Choose this option to build a kernel for release 2 or later of the
MIPS32 architecture including features from the 3.5 release such as
support for Enhanced Virtual Addressing (EVA).
MIPS32 architecture including features from the 3.5 release such as
support for Enhanced Virtual Addressing (EVA).