CONFIG_CPU_AT32AP700X is not available for thedefaultarchitecture x86.
Result is shown for architecture avr32

CONFIG_CPU_AT32AP700X (not configurable)

modulename: at32ap700x.ko

configname: CONFIG_CPU_AT32AP700X

Linux Kernel Configuration
└─>System Type and features
└─>CPU_AT32AP700X
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
source code:
/arch/avr32/mach-at32ap/