CONFIG_ETRAX_WATCHDOG is not available for thedefaultarchitecture x86.
Result is shown for architecture cris
default or selected kernelversion does not have config value CONFIG_ETRAX_WATCHDOG.
Result is shown for kernelversion 6.7-rc3

Enable ETRAX watchdog

configname: CONFIG_ETRAX_WATCHDOG

Linux Kernel Configuration
└─>General setup
└─>Enable ETRAX watchdog
In linux kernel since version 2.6.12  
Enable the built-in watchdog timer support on ETRAX based embedded
network computers.