CONFIG_ARCH_MSM_DT is not available for the default architecture x86.
Result is shown for architecture arm or arm64
default or selected kernelversion does not have config value CONFIG_ARCH_MSM_DT.
Result is shown for kernelversion 3.14.9

Qualcomm MSM DT Support

modulename: board-dt.ko
configname: CONFIG_ARCH_MSM_DT

Linux Kernel Configuration
└─> Qualcomm MSM DT Support

Support for Qualcomm's devicetree based MSM systems.

source code: