config: Disable EFI_FAKE_MEMMAP support for arm64 by default

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7F3NP


CVE: NA

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EFI_FAKE_MEMMAP is used specific memory range by updating original
(firmware provided) EFI memmap. This can only be used for debug
propose. Disable it by default.

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