arm64: change compat_elf_hwcap and compat_elf_hwcap2 prefix to a32

maillist inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8JVJ3
CVE: NA

Reference: https://github.com/norov/linux/commits/ilp32-5.2



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ILP32 patch series introduces new type of binaries which is also compat.
So rename existung aarch32 compat_elf_hwcap's helps to avoid confusing.

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Yury Norov <ynorov@marvell.com>
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Signed-off-by: Chen Jiahao <chenjiahao16@huawei.com>

Conflicts:
	arch/arm64/kernel/cpufeature.c

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>