ksmbd: remove unnecessary softdep on crc32

ksmbd accesses crc32 using normal function calls (as opposed to e.g.
the generic crypto infrastructure's name-based algorithm resolution), so
there is no need to declare a module softdep.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>