audit: Make AUDIT_KERNEL event conform to the specification

The AUDIT_KERNEL event is not following name=value format. This causes
some information to get lost. The event has been reformatted to follow
the convention. Additionally the audit_enabled value was added for
troubleshooting purposes. The following is an example of the new event:

  type=KERNEL audit(1480621249.833:1): state=initialized
              audit_enabled=0 res=1

Signed-off-by: Steve Grubb <sgrubb@redhat.com>
[PM: commit tweaks to make checkpatch.pl happy]
Signed-off-by: Paul Moore <paul@paul-moore.com>
diff --git a/kernel/audit.c b/kernel/audit.c
index 4101768..57acf25 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1344,7 +1344,9 @@
 		panic("audit: failed to start the kauditd thread (%d)\n", err);
 	}
 
-	audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL, "initialized");
+	audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL,
+		"state=initialized audit_enabled=%u res=1",
+		 audit_enabled);
 
 	return 0;
 }