Change MBEDTLS_ECP_DP_MAX to 14

Signed-off-by: Brett Warren <brett.warren@arm.com>
diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index b2a2e32..5b26084 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -130,10 +130,8 @@
 
 /**
  * The number of supported curves, plus one for #MBEDTLS_ECP_DP_NONE.
- *
- * \note Montgomery curves are currently excluded.
  */
-#define MBEDTLS_ECP_DP_MAX     12
+#define MBEDTLS_ECP_DP_MAX     14
 
 /*
  * Curve types