ima: Do not print policy rule with inactive LSM labels

Before printing a policy rule scan for inactive LSM labels in the policy
rule. Inactive LSM labels are identified by args_p != NULL and
rule == NULL.

Fixes: 483ec26e ("ima: ima/lsm policy rule loading logic bug fixes")
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Cc: <stable@vger.kernel.org> # v5.6+
Acked-by: Christian Brauner <brauner@kernel.org>
[zohar@linux.ibm.com: Updated "Fixes" tag]
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>