!3670 Add initial openeuler_defconfig for riscv64

Merge Pull Request from: @xingmz 
 
Based on openEuler-23.09 openeuler_defconfig for riscv, use the
commands introduced in commit ("kconfig: Add script to check & update
openeuler_defconfig") to generate the initial openeuler_defconfig for
OLK-6.6 riscv64.
    
Build and boot testing passed.
OBS link: https://build.openeuler.openatom.cn/package/show/openEuler:23.09:RISC-V:wakernel/kernel 
 
Link:https://gitee.com/openeuler/kernel/pulls/3670

 

Reviewed-by: Zhang Xuzhou <zhangxuzhou4@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>