CONFIG_MACH_TS219_DT is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Device Tree for QNAP TS-11X, TS-21X NAS

modulename: board-ts219.ko

configname: CONFIG_MACH_TS219_DT

Linux Kernel Configuration
└─>Marvell Kirkwood Implementations
└─>Device Tree for QNAP TS-11X, TS-21X NAS
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say 'Y' here if you want your kernel to support the QNAP
TS-110, TS-119, TS-119P+, TS-210, TS-219, TS-219P and
TS-219P+ Turbo NAS devices using Fattened Device Tree.
There are two different Device Tree descriptions, depending
on if the device is based on an if the board uses the MV6281
or MV6282. If you have the wrong one, the buttons will not
work.

source code: