default or selected kernelversion does not have config value CONFIG_AR7_WDT.
Result is shown for kernelversion 6.9.9
TI AR7 Watchdog Timer
modulename: ar7_wdt.ko
configname: CONFIG_AR7_WDT
Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>TI AR7 Watchdog Timer
In linux kernel since version 2.6.24 (release Date: 2008-01-24)
Hardware driver for the TI AR7 Watchdog Timer.