safesetid: move initcalls to the LSM framework

Reviewed-by: Kees Cook <[e-mail]>
Acked-by: Micah Morton <[e-mail]>
Reviewed-by: John Johansen <[e-mail]>
Signed-off-by: Paul Moore <[e-mail]>

security/safesetid/lsm.c

···
 DEFINE_LSM(safesetid_security_init) = {
 	.id = &safesetid_lsmid,
 	.init = safesetid_security_init,
+	.initcall_fs = safesetid_init_securityfs,
 };

security/safesetid/lsm.h

···
 extern struct setid_ruleset __rcu *safesetid_setuid_rules;
 extern struct setid_ruleset __rcu *safesetid_setgid_rules;
 
+int safesetid_init_securityfs(void);
+
 #endif /* _SAFESETID_H */

security/safesetid/securityfs.c

···
 	.write = safesetid_gid_file_write,
 };
 
-static int __init safesetid_init_securityfs(void)
+int __init safesetid_init_securityfs(void)
 {
 	int ret;
 	struct dentry *policy_dir;
···
 	securityfs_remove(policy_dir);
 	return ret;
 }
-fs_initcall(safesetid_init_securityfs);