CONFIG_MACH_EDB9315A is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Support Cirrus Logic EDB9315A

configname: CONFIG_MACH_EDB9315A

Linux Kernel Configuration
└─>EP93xx-based
└─>Support Cirrus Logic EDB9315A
In linux kernel since version 2.6.18 (release Date: 2006-09-19)  
Say 'Y' here if you want your kernel to support the Cirrus
Logic EDB9315A Evaluation Board.