crypto: ccp: ccp-dev: Fix a little doc-rot

Fixes the following W=1 kernel build warning(s):

 drivers/crypto/ccp/ccp-dev.c:476: warning: Function parameter or member 'sp' not described in 'ccp_alloc_struct'
 drivers/crypto/ccp/ccp-dev.c:476: warning: Excess function parameter 'dev' description in 'ccp_alloc_struct'
 drivers/crypto/ccp/ccp-dev.c:476: warning: Function parameter or member 'sp' not described in 'ccp_alloc_struct'
 drivers/crypto/ccp/ccp-dev.c:476: warning: Excess function parameter 'dev' description in 'ccp_alloc_struct'

Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: John Allen <john.allen@amd.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Gary R Hook <gary.hook@amd.com>
Cc: linux-crypto@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/ccp/ccp-dev.c

@@ -470,7 +470,7 @@ int ccp_cmd_queue_thread(void *data)
 /**
  * ccp_alloc_struct - allocate and initialize the ccp_device struct
  *
- * @dev: device struct of the CCP
+ * @sp: sp_device struct of the CCP
  */
 struct ccp_device *ccp_alloc_struct(struct sp_device *sp)
 {