CONFIG_MACH_TS41X is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

QNAP TS-410, TS-410U, TS-419P, TS-419P+ and TS-419U Turbo NAS

modulename: ts41x-setup.ko

configname: CONFIG_MACH_TS41X

Linux Kernel Configuration
└─>Marvell Kirkwood Implementations
└─>QNAP TS-410, TS-410U, TS-419P, TS-419P+ and TS-419U Turbo NAS
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
Say 'Y' here if you want your kernel to support the
QNAP TS-410, TS-410U, TS-419P, TS-419P+ and TS-419U Turbo
NAS devices.

source code: