Prior instantiating RNG we have to ensure if the CAAM job rings are available. Avoid hardcoded job ring max size and use the definition at fsl_sec.h Signed-off-by: Breno Lima <breno.lima@nxp.com> Reviewed-by: Ye Li <ye.li@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com>