CONFIG_S3C_BOOT_WATCHDOG is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_S3C_BOOT_WATCHDOG.
Result is shown for kernelversion 6.2.5

S3C Initialisation watchdog

configname: CONFIG_S3C_BOOT_WATCHDOG

Linux Kernel Configuration
└─>S3C Initialisation watchdog
In linux kernel since version 2.6.23 (release Date: 2007-10-09)  
Say y to enable the watchdog during the kernel decompression
stage. If the kernel fails to uncompress, then the watchdog
will trigger a reset and the system should restart.