CONFIG_CPU_PXA910 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
CONFIG_CPU_PXA910 (not configurable)
configname: CONFIG_CPU_PXA910
Linux Kernel Configuration
└─>Marvell PXA168/910/MMP2/MMP3
└─>CPU_PXA910
In linux kernel since version 2.6.30 (release Date: 2009-06-09)
Select code specific to PXA910