CONFIG_SAMSUNG_WDT_RESET is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_SAMSUNG_WDT_RESET (not configurable)

modulename: watchdog-reset.ko

configname: CONFIG_SAMSUNG_WDT_RESET

Linux Kernel Configuration
└─>SAMSUNG_WDT_RESET
In linux kernel since version 3.11 (release Date: 2013-09-02)  
Compile support for system restart by triggering watchdog reset.
Used on SoCs that do not provide dedicated reset control.

source code:
arch/arm/plat-samsung/watchdog-reset.c