CONFIG_MACH_DAVINCI_DA850_EVM is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_DAVINCI_DA850_EVM.
Result is shown for kernelversion 6.9.9

TI DA850/OMAP-L138/AM18x Reference Platform

modulename: board-da850-evm.ko

configname: CONFIG_MACH_DAVINCI_DA850_EVM

Linux Kernel Configuration
└─>TI DaVinci
└─>TI DA850/OMAP-L138/AM18x Reference Platform
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
Say Y here to select the TI DA850/OMAP-L138/AM18x Evaluation Module.

source code:
arch/arm/mach-davinci/board-da850-evm.c