CONFIG_MACH_RD78X00_MASA is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Marvell RD-78x00-mASA Reference Design

modulename: rd78x00-masa-setup.ko

configname: CONFIG_MACH_RD78X00_MASA

Linux Kernel Configuration
└─>Marvell MV78xx0
└─>Marvell RD-78x00-mASA Reference Design
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
Say 'Y' here if you want your kernel to support the
Marvell RD-78x00-mASA Reference Design.

source code:
arch/arm/mach-mv78xx0/rd78x00-masa-setup.c