Fixes the following sparse warning:

drivers/crypto/ccp/ccp-dev.c:44:6: warning:
 symbol 'ccp_error_codes' was not declared. Should it be static?
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Acked-by: NGary R Hook <gary.hook@amd.com>
Acked-by: NGary R Hook <gary.hook@amd.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>