default or selected kernelversion does not have config value CONFIG_MTD_AR7_PARTS.
Result is shown for kernelversion 6.9.9

TI AR7 partitioning parser

modulename: ar7part.ko

configname: CONFIG_MTD_AR7_PARTS

Linux Kernel Configuration
└─>Device Drivers
└─>Memory Technology Device (MTD) support
└─>Partition parsers
└─>TI AR7 partitioning parser
In linux kernel since version 2.6.26 (release Date: 2008-07-13)  
TI AR7 partitioning parser support

source code:
drivers/mtd/parsers/ar7part.c
depends
CONFIG_MTD