CONFIG_CPU_PXA955 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
CONFIG_CPU_PXA955 (not configurable)
configname: CONFIG_CPU_PXA955
Linux Kernel Configuration
└─>CPU_PXA955
In linux kernel since version 2.6.38 (release Date: 2011-03-14)
PXA950 (codename MG1)