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

Marvell PXA168/910/MMP2

modulename: mfp.ko

and/or

irq-mmp.ko

configname: CONFIG_ARCH_MMP

ARM system type
└─>Marvell PXA168/910/MMP2
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.

source code:
arch/arm/plat-pxa/mfp.c

depends
CONFIG_MMU

is selected by
CONFIG_MACH_TAVOREVB