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

Support MMP (ARMv5) platforms from device tree

modulename: mmp-dt.ko

and/or

clk-of-pxa168.ko

configname: CONFIG_MACH_MMP_DT

Linux Kernel Configuration
└─>Marvell PXA168/910/MMP2
└─>Marvell PXA168/910/MMP2 Implementations
└─>Support MMP (ARMv5) 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. Needn't select any other machine while
MACH_MMP_DT is enabled.

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