CONFIG_GENERIC_CMOS_UPDATE is not available for thedefaultarchitecture x86.
Result is shown for architecture i386

CONFIG_GENERIC_CMOS_UPDATE (not configurable)

configname: CONFIG_GENERIC_CMOS_UPDATE

Linux Kernel Configuration
└─>GENERIC_CMOS_UPDATE
In linux kernel since version 2.6.23 (release Date: 2007-10-09)