CONFIG_MACH_DB78X00_BP is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Marvell DB-78x00-BP Development Board

modulename: db78x00-bp-setup.ko

configname: CONFIG_MACH_DB78X00_BP

Linux Kernel Configuration
└─>Marvell MV78xx0
└─>Marvell DB-78x00-BP Development Board
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
Say 'Y' here if you want your kernel to support the
Marvell DB-78x00-BP Development Board.

source code:
arch/arm/mach-mv78xx0/db78x00-bp-setup.c