CONFIG_ARM64_PTDUMP_CORE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

CONFIG_ARM64_PTDUMP_CORE (not configurable)

modulename: dump.ko

configname: CONFIG_ARM64_PTDUMP_CORE

Linux Kernel Configuration
└─>ARM64_PTDUMP_CORE
In linux kernel since version 4.1 (release Date: 2015-06-21)  
source code:
arch/arm64/mm/dump.c