efi: Make efi_print_memmap() public

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4PM01


CVE: NA

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Make efi_print_memmap() public in preparation for adding fake memory
support for architecture with efi support, eg, arm64.

Co-developed-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>