crypto: starfive - Update hash dma usage

Current hash uses sw fallback for non-word aligned input scatterlists.
Add support for unaligned cases utilizing the data valid mask for dma.

Signed-off-by: Jia Jie Ho <jiajie.ho@starfivetech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>