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

Support Versatile Platform Baseboard for ARM926EJ-S

modulename: versatile_pb.ko

configname: CONFIG_ARCH_VERSATILE_PB

Linux Kernel Configuration
└─>Versatile platform type
└─>Support Versatile Platform Baseboard for ARM926EJ-S
In linux kernel since version 2.6.12  
Include support for the ARM(R) Versatile Platform Baseboard
for the ARM926EJ-S.

source code:
/arch/arm/mach-versatile/versatile_pb.c