CONFIG_CPU_PXA950 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

PXA950 (codename Tavor-PV2)

configname: CONFIG_CPU_PXA950

Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>Supported PXA3xx Processor Variants
└─>PXA950 (codename Tavor-PV2)
In linux kernel since version 2.6.32 (release Date: 2009-12-02)