config: update defconfig for PAGE_EJECT

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8K5CO



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Enable PAGE_EJECT for arm64 by default and disable it for x86 since
it is not fully tested in x86.

Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>