SELinux: return EOPNOTSUPP not ENOTSUPP

ENOTSUPP is not a valid error code in the kernel (it is defined in some
NFS internal error codes and has been improperly used other places).  In
the !CONFIG_SECURITY_SELINUX case though it is possible that we could
return this from selinux_audit_rule_init().  This patch just returns the
userspace valid EOPNOTSUPP.
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

include/linux/selinux.h

@@ -136,7 +136,7 @@ static inline int selinux_audit_rule_init(u32 field, u32 op,
                                           char *rulestr,
                                           struct selinux_audit_rule **rule)
 {
-	return -ENOTSUPP;
+	return -EOPNOTSUPP;
 }
 
 static inline void selinux_audit_rule_free(struct selinux_audit_rule *rule)