CONFIG_MACH_T5325 is not available for the selected architecture x86.
Result is shown for architecture arm

HP t5325 Thin Client

modulename: t5325-setup.ko

and/or

board-t5325.ko

configname: CONFIG_MACH_T5325

Linux Kernel Configuration
└─>Marvell Kirkwood Implementations
└─>HP t5325 Thin Client
In linux kernel since version 2.6.36 (release Date: 2010-10-20)
Say 'Y' here if you want your kernel to support the
HP t5325 Thin Client.
source code:
arch/arm/mach-kirkwood/t5325-setup.c

depends
CONFIG_ARCH_KIRKWOOD or CONFIG_ARCH_MVEBU |
| CONFIG_MACH_KIRKWOOD