CONFIG_CPU_MMP2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_MMP2 (not configurable)

configname: CONFIG_CPU_MMP2

Linux Kernel Configuration
└─>Marvell PXA168/910/MMP2/MMP3
└─>CPU_MMP2
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
Select code specific to MMP2. MMP2 is ARMv7 compatible.