CONFIG_MACH_TS209 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

QNAP TS-109/TS-209

modulename: ts209-setup.ko

configname: CONFIG_MACH_TS209

Linux Kernel Configuration
└─>Marvell Orion
└─>QNAP TS-109/TS-209
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
Say 'Y' here if you want your kernel to support the
QNAP TS-109/TS-209 platform.

source code:
/arch/arm/mach-orion5x/