hw: Model ASPEED's Hash and Crypto Engine

hw: Model ASPEED's Hash and Crypto Engine

The HACE (Hash and Crypto Engine) is a device that offloads MD5, SHA1,
SHA2, RSA and other cryptographic algorithms.

This initial model implements a subset of the device's functionality;
currently only MD5/SHA hashing, and on the ast2600's scatter gather
engine.

Co-developed-by: Klaus Heinrich Kiwi <klaus@linux.vnet.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
[ clg: - fixes for 32-bit and OSX builds ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20210409000253.1475587-2-joel@jms.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>