ECJPAKE: always use MD light

This enables access to all available hashes, instead of the previous
situation where you had to choose by including MD_C or not.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/include/mbedtls/build_info.h b/include/mbedtls/build_info.h
index bfbf9de..b84aaee 100644
--- a/include/mbedtls/build_info.h
+++ b/include/mbedtls/build_info.h
@@ -89,7 +89,8 @@
 
 /* Auto-enable MBEDTLS_MD_LIGHT if some module needs it.
  */
-#if defined(MBEDTLS_PEM_PARSE_C) || \
+#if defined(MBEDTLS_ECJPAKE_C) || \
+    defined(MBEDTLS_PEM_PARSE_C) || \
     defined(MBEDTLS_RSA_C)
 #define MBEDTLS_MD_LIGHT
 #endif