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

Harmony board

modulename: board-harmony.ko

and/or

board-harmony-pinmux.ko

and/or

board-harmony-pcie.ko

and/or

board-harmony-power.ko

configname: CONFIG_MACH_HARMONY

Linux Kernel Configuration
└─>Harmony board
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
Support for nVidia Harmony development platform

source code:
arch/arm/mach-tegra/board-harmony.c