Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

another missing change for recent crypto mods

Implement support for HMAC/SHA1 and HMAC/SHA256 acceleration found in
new VIA CPUs.
For older CPUs HMAC/SHA1 and HMAC/SHA256 (and others) will still be done
in software.

Move symmetric cryptography (currently only AES-CBC 128/192/256) to
padlock_cipher.c file. Move HMAC cryptography to padlock_hash.c file.

Hardware from: Centaur Technologies

Add VIA/ACE "PadLock" support as a crypto(9) driver.

HW donated by: Mike Tancsa <mike@sentex.net>
Most of the code obtained from: OpenBSD
MFC after: 3 days