Switch to the new code style

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/constant_time.h b/include/mbedtls/constant_time.h
index c5de57a..8419c99 100644
--- a/include/mbedtls/constant_time.h
+++ b/include/mbedtls/constant_time.h
@@ -38,8 +38,8 @@
  * \return      Zero if the content of the two buffer is the same,
  *              otherwise non-zero.
  */
-int mbedtls_ct_memcmp( const void *a,
-                       const void *b,
-                       size_t n );
+int mbedtls_ct_memcmp(const void *a,
+                      const void *b,
+                      size_t n);
 
 #endif /* MBEDTLS_CONSTANT_TIME_H */