crypto: create generic version of ablk_helper

Create a generic version of ablk_helper so it can be reused
by other architectures.

Change-Id: I17faf53e3a393ead88b5776fafe470e550c24385
Acked-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
defconfig: enable ARM optimised AES and SHA1 routines with NEON and kernel mode NEON and its dependencies

Change-Id: I1a0319b6af71b9f612c6bcf9e38d7797710b9e7e
Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>