default or selected kernelversion does not have config value CONFIG_ZX2967_WATCHDOG.
Result is shown for kernelversion 6.9.9

ZTE zx2967 SoCs watchdog support

modulename: zx2967_wdt.ko

configname: CONFIG_ZX2967_WATCHDOG

Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>ZTE zx2967 SoCs watchdog support
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Say Y here to include support for the watchdog timer
in ZTE zx2967 SoCs.
To compile this driver as a module, choose M here: the
module will be called zx2967_wdt.

source code: