Fix a bug for aarch64 BigEndian
FIXES #10692 #10638
a bug for aarch64 bigendian with instructions 'st1' and 'ld1' on AES-GCM mode.

CLA: trivial

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/10751)
