crypto: ccp - Remove redundant __GFP_ZERO

Remove the redundant __GFP_ZERO flag from kzalloc() since kzalloc()
inherently zeroes memory.

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>