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

Marvell's PXA168 GuruPlug Display (gplugD) Board

modulename: gplugd.ko

configname: CONFIG_MACH_GPLUGD

Linux Kernel Configuration
└─>Marvell PXA168/910/MMP2 Implmentations
└─>Marvell's PXA168 GuruPlug Display (gplugD) Board
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say 'Y' here if you want to support the Marvell PXA168-based
GuruPlug Display (gplugD) Board

source code:

depends
CONFIG_ARCH_MMP |
| CONFIG_ARCH_MULTI_V5 or CONFIG_ATAGS