CONFIG_CPU_LOONGSON2E is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

Loongson 2E

configname: CONFIG_CPU_LOONGSON2E

CPU type
└─>Loongson 2E
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
The Loongson 2E processor implements the MIPS III instruction set
with many extensions.

It has an internal FPGA northbridge, which is compatible to
bonito64.