CONFIG_CPU_PXA950 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_CPU_PXA950.
Result is shown for kernelversion 5.4.69

CONFIG_CPU_PXA950 (not configurable)

configname: CONFIG_CPU_PXA950

Linux Kernel Configuration
└─>CPU_PXA950
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
PXA950 (codename Tavor-PV2)