crypto: arm - add support for SHA-224/256 using ARMv8 Crypto Extensions

This implements the SHA-224/256 secure hash algorithm using the AArch32
versions of the ARMv8 Crypto Extensions for SHA2.

Change-Id: I54bb1a149b123bf039c26582480a7537932a7dbc
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
[rsiddoji@codeaurora.org: resolve trivial merge conflicts]
Git-commit: 006d0624fa0d71787448cacee0195bf20f2d47c8
Git-repo: https://git.kernel.org/cgit/linux/kernel/git/herbert/crypto-2.6.git


Signed-off-by: Ravi Kumar Siddojigari <rsiddoji@codeaurora.org>