CONFIG_APUS is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Amiga-APUS

modulename: apus_setup.ko

configname: CONFIG_APUS

Machine type
└─>Amiga-APUS
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
Select APUS if configuring for a PowerUP Amiga.
More information is available at:
<http://linux-apus.sourceforge.net/>.

source code:
arch/ppc/platforms/apus_setup.c
depends
CONFIG_BROKEN
CONFIG_PPC32