crypto: ccp - return NULL instead of 0

crypto: ccp - return NULL instead of 0

Orabug: 26644685

This change is to handle sparse warning. Return type of function is a pointer to the structure and
it returns 0. Instead it should return NULL.

Signed-off-by: Pushkar Jambhlekar <pushkar.iit@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit 9d1fb19668207b66bc54f8e10fa91a2fcff061e4)
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>