Allow the oSSL pbkdf2-sha* code to also be included in SSE2 builds. Now pbkdf2-hmac-sha512_fmt_plug.c can fully use the header functions, even when built with SSE.  No reason to keep the internal hmac function in this fmt file any more. It was used in cmp_exact.
Merge remote-tracking branch 'origin/bleeding-jumbo' into memdbg