config: Add FORCE_NR_CPUS to openeuler_defconfig

hulk inclusion
category: cleanup
bugzilla: https://gitee.com/openeuler/kernel/issues/I8KQBZ


CVE: NA

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Update openeuler_defconfig for FORCE_NR_CPUS in ARM64 and x86

Signed-off-by: Zheng Zucheng <zhengzucheng@huawei.com>