!1786 LoongArch: export lsx/lasx related struct to user space

Merge Pull Request from: @Hongchen_Zhang 
 
    To keep consistent with upstream uapi headers,we expoort lsx/lasx
    related struct to user space.
 
 
Link:https://gitee.com/openeuler/kernel/pulls/1786

 

Reviewed-by: Li Xuefeng <lixuefeng@loongson.cn>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>