CONFIG_CEVT_DS1287 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_CEVT_DS1287 (not configurable)

modulename: cevt-ds1287.ko

configname: CONFIG_CEVT_DS1287

Linux Kernel Configuration
└─>CEVT_DS1287
In linux kernel since version 2.6.26 (release Date: 2008-07-13)  
source code:
arch/mips/kernel/cevt-ds1287.c