CONFIG_MACH_MMP2_DT is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Support MMP2 (ARMv7) platforms from device tree

modulename: mmp2-dt.ko

configname: CONFIG_MACH_MMP2_DT

Linux Kernel Configuration
└─>Marvell PXA168/910/MMP2 Implmentations
└─>Support MMP2 (ARMv7) platforms from device tree
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Include support for Marvell MMP2 based platforms using
the device tree.

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