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

CONFIG_HAVE_PROC_CPU (not configurable)

configname: CONFIG_HAVE_PROC_CPU

Linux Kernel Configuration
└─>HAVE_PROC_CPU
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
is depended by
CONFIG_SWP_EMULATE