Fix compile err when building VC-CLANG-WIN64-CLANGASM-ARM target

The error happens with MSVC v143,C++ Clang Compiler for Windows(16.0.5)

Error is "brackets expression not supported on this target" in libcrypto-shlib-bsaes-armv8.obj.asm

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25293)

(cherry picked from commit d20cf21b)