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

VPE loader support.

modulename: vpe.ko

configname: CONFIG_MIPS_VPE_LOADER

Linux/MIPS Kernel Configuration
└─>Kernel type
└─>VPE loader support.
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
Includes a loader for loading an elf relocatable object
onto another VPE and running it.

source code:
arch/mips/kernel/vpe.c

depends
CONFIG_SYS_SUPPORTS_MULTITHREADING or CONFIG_MODULES |
| CONFIG_SYS_SUPPORTS_VPE_LOADER