CONFIG_MACH_MICRO9S is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Support Contec Micro9-Slim

configname: CONFIG_MACH_MICRO9S

Linux Kernel Configuration
└─>Cirrus EP93xx Implementation Options
└─>Support Contec Micro9-Slim
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
Say 'Y' here if you want your kernel to support the
Contec Micro9-Slim board.