crypto: ccp - Refactor code to enable checks for queue space.

crypto: ccp - Refactor code to enable checks for queue space.

Orabug: 26644685

Available queue space is used to decide (by counting free slots)
if we have to put a command on hold or if it can be sent
to the engine immediately.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit bb4e89b34d1bf46156b7e880a0f34205fb7ce2a5)
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>