[CRYPTO] tcrypt: Use test_hash for crc32c

Now that crc32c has been fixed to conform with standard digest semantics,
we can use test_hash for it.  I've turned the last test into a chunky
test.

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

diff --cc crypto/tcrypt.c
Simple merge

diff --cc crypto/tcrypt.h
Simple merge