CONFIG_ARCH_WM8505 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

VIA/Wondermedia 85xx and WM8650

configname: CONFIG_ARCH_WM8505

Linux Kernel Configuration
└─>VIA/Wondermedia 85xx and WM8650
In linux kernel since version 3.1 (release Date: 2011-10-24)