CONFIG_MACH_SNAPPER_CL15 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Support Bluewater Systems Snapper CL15 Module

modulename: snappercl15.ko

configname: CONFIG_MACH_SNAPPER_CL15

Linux Kernel Configuration
└─>Cirrus EP93xx Implementation Options
└─>Support Bluewater Systems Snapper CL15 Module
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
Say 'Y' here if you want your kernel to support the Bluewater
Systems Snapper CL15 Module.

source code:
arch/arm/mach-ep93xx/snappercl15.c