openeuler_defconfig: Enable CONFIG_KABI_RESERVE for x86 and arm64

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4K3S5



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Enable CONFIG_KABI_RESERVE for x86 and arm64 architectures in
openeuler_defconfig by default.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>