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

Enable Sharp SL-1000 (Akita) Support

modulename: akita-ioexp.ko

configname: CONFIG_MACH_AKITA

Linux Kernel Configuration
└─>Enable Sharp SL-1000 (Akita) Support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
source code:
arch/arm/mach-pxa/akita-ioexp.c
selects
CONFIG_PXA_SHARP_Cxx00
CONFIG_MACH_SPITZ
CONFIG_I2C
CONFIG_I2C_PXA