build_info: fixed comment

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/include/mbedtls/build_info.h b/include/mbedtls/build_info.h
index 8c41350..ba5844f 100644
--- a/include/mbedtls/build_info.h
+++ b/include/mbedtls/build_info.h
@@ -105,9 +105,9 @@
 #define MBEDTLS_MD_LIGHT
 #endif
 
-/* MBEDTLS_ECP_C is now a subset of MBEDTLS_ECP_LIGHT which contains the
- * arithmetic part. As a consequence if MBEDTLS_ECP_C is required for
- * some reason, then MBEDTLS_ECP_LIGHT should be enabled as well. */
+/* MBEDTLS_ECP_C now consists of MBEDTLS_ECP_LIGHT plus functions for curve
+ * arithmetic. As a consequence if MBEDTLS_ECP_C is required for some reason,
+ * then MBEDTLS_ECP_LIGHT should be enabled as well. */
 #if defined(MBEDTLS_ECP_C)
 #define MBEDTLS_ECP_LIGHT
 #endif