Minor style improvements

Signed-off-by: Chris Jones <christopher.jones@arm.com>
diff --git a/include/mbedtls/x509_crl.h b/include/mbedtls/x509_crl.h
index f89547c..fcaa149 100644
--- a/include/mbedtls/x509_crl.h
+++ b/include/mbedtls/x509_crl.h
@@ -148,7 +148,7 @@
  */
 int mbedtls_x509_crl_info( char *buf, size_t size, const char *prefix,
                    const mbedtls_x509_crl *crl );
-#endif
+#endif /* !MBEDTLS_X509_REMOVE_INFO */
 
 /**
  * \brief          Initialize a CRL (chain)