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

PXA930 Handheld Platform (aka SAAR)

modulename: saar.ko

configname: CONFIG_MACH_SAAR

Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>PXA930 Handheld Platform (aka SAAR)
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
source code:
arch/arm/mach-pxa/saar.c

depends
CONFIG_ARCH_PXA