default or selected kernelversion does not have config value CONFIG_COH901327_WATCHDOG.
Result is shown for kernelversion 6.9.9

ST-Ericsson COH 901 327 watchdog

modulename: coh901327_wdt.ko

configname: CONFIG_COH901327_WATCHDOG

Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>ST-Ericsson COH 901 327 watchdog
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
Say Y here to include Watchdog timer support for the
watchdog embedded into the ST-Ericsson U300 series platforms.
This watchdog is used to reset the system and thus cannot be
compiled as a module.

source code: