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

Samsung Aquila

modulename: mach-aquila.ko

configname: CONFIG_MACH_AQUILA

Linux Kernel Configuration
└─>Samsung Aquila
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
Machine support for the Samsung Aquila target based on S5PC110 SoC

source code:
/arch/arm/mach-s5pv210/mach-aquila.c