CONFIG_MTD_NAND_CORE (not configurable)

modulename: nandcore.ko

configname: CONFIG_MTD_NAND_CORE

Linux Kernel Configuration
└─>Device Drivers
└─>Memory Technology Device (MTD) support
└─>NAND
└─>MTD_NAND_CORE
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/mtd/nand//
depends
CONFIG_MTD