CONFIG_CPU_PXA910 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_PXA910 (not configurable)

modulename: clock-pxa910.ko

and/or

pxa910.ko

and/or

clk-pxa910.ko

and/or

pm-pxa910.ko

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