crypto: wp512 - Use API partial block handling

On Fri, Jun 20, 2025 at 10:52:49AM +0200, Milan Broz wrote:
>
> It s still failing for me for that userspace crypt API.

OK I screwed up the final marker.  The old code always left a
zero byte in the buffer so the finalisation could simply or it
with 0x80.  With the new code, we need to set it to 0x80 explicitly
instead of oring.

---8<---
Use the Crypto API partial block handling.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>