CONFIG_SYS_SUPPORTS_VPE_LOADER is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_SYS_SUPPORTS_VPE_LOADER (not configurable)

configname: CONFIG_SYS_SUPPORTS_VPE_LOADER

Linux Kernel Configuration
└─>Kernel type
└─>SYS_SUPPORTS_VPE_LOADER
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Indicates that the platform supports the VPE loader, and provides
physical_memsize.