CONFIG_SYS_HAS_CPU_R6000 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_SYS_HAS_CPU_R6000.
Result is shown for kernelversion 6.5.1

CONFIG_SYS_HAS_CPU_R6000 (not configurable)

configname: CONFIG_SYS_HAS_CPU_R6000

Linux Kernel Configuration
└─>CPU selection
└─>SYS_HAS_CPU_R6000
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
is selected by
CONFIG_CPU_R6000