crypto: caam - fix error reporting for caam_hash_alloc

Fix error reporting when preparation of an hmac algorithm
for registration fails: print the hmac algorithm name, not the unkeyed
hash algorithm name.

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>