efi/libstub: add arm64 kaslr memory region avoid support

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8RJ1I


CVE: NA

--------------------------------

Add arm64 kaslr memory region avoid support code, this
patch refer to the kaslr avoid mem region code structure
of x86.

Signed-off-by: Felix Fu <fuzhen5@huawei.com>