CONFIG_ICST307 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_ICST307 (not configurable)

modulename: icst307.ko

configname: CONFIG_ICST307

Linux Kernel Configuration
└─>ICST307
In linux kernel since version 2.6.12  
source code:
arch/arm/common/icst307.c