[loongson-support 10/27] add loongson-specific cpu-feature-overrides.h

[wuzhangjin@gmail.com]

From: Wu Zhangjin <wuzhangjin@gmail.com>

This file will obviously reduce the size of kernel image file, reduce
tons of branches and enhance the performance.

$ wc -c vmlinux         // before
8054849 vmlinux
$ wc -c vmlinux         // after
7626936 vmlinux
$ echo $(((8054849-7626936)/1024))      // kb
417
$ echo "(8054849-7626936)/8054849" | bc -l
.05312489408553779220

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>

-- 
1.6.2.1