Created by: fhahn
All required XINST_ macros required by drx_buf_insert_buf_memcpy have been added for AArch64 and the ifndef AARCH64 guards can be removed from drx_buf_insert_buf_memcpy and the accompanying test drx_buf-test.dll.c
Thanks @toshipiazza for pointing that out!
Fixes #2520 (closed).