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

CONFIG_CPU_MMP2 (not configurable)

modulename: mmp2.ko

and/or

clock-mmp2.ko

and/or

pm-mmp2.ko

and/or

clk-mmp2.ko

configname: CONFIG_CPU_MMP2

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

source code:
arch/arm/mach-mmp/mmp2.c
selects
CONFIG_CPU_PJ4

depends
CONFIG_ARCH_MMP