CONFIG_CPU_HAS_ADDRESS_SPACES is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

CONFIG_CPU_HAS_ADDRESS_SPACES (not configurable)

configname: CONFIG_CPU_HAS_ADDRESS_SPACES

Linux Kernel Configuration
└─>CPU_HAS_ADDRESS_SPACES
In linux kernel since version 3.1 (release Date: 2011-10-24)