crypto: safexcel - Add support for authenc(hmac(md5),*) suites

crypto: safexcel - Add support for authenc(hmac(md5),*) suites

This patch adds support for the following AEAD ciphersuites:
- authenc(hmac(md5),cbc(aes))
- authenc(hmac(md5),cbc(des)))
- authenc(hmac(md5),cbc(des3_ede))
- authenc(hmac(md5),rfc3686(ctr(aes)))

The first three ciphersuites were tested using testmgr and the recently
sent test vectors. They passed self-tests.

This is enhanced version of the patch found in the mtk-openwrt-feeds repo.

Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Reviewed-by: Antoine Tenart <atenart@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>