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

Marvell's PXA168 Aspenite Development Board

modulename: aspenite.ko

configname: CONFIG_MACH_ASPENITE

Linux Kernel Configuration
└─>Marvell PXA168/910/MMP2 Implmentations
└─>Marvell's PXA168 Aspenite Development Board
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
Say 'Y' here if you want to support the Marvell PXA168-based
Aspenite Development Board.

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

depends
CONFIG_ARCH_MMP |
| CONFIG_ARCH_MULTI_V5 or CONFIG_ATAGS or CONFIG_UNUSED_BOARD_FILES