Add mbed support for malloc() and free()

Author: Chris Trowbridge

erpc_c/port/erpc_port_mbed.cpp

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2020, Embedded Planet, Inc
+ * All rights reserved.
+ *
+ * For supporting transports and examples see:
+ * https://github.com/EmbeddedPlanet/mbed-rpc
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "erpc_port.h"
+
+#if ERPC_THREADS_IS(MBED)
+
+#include <cstdlib>
+
+using namespace std;
+
+void *erpc_malloc(size_t size)
+{
+    void *p = malloc(size);
+    return p;
+}
+
+void erpc_free(void *ptr)
+{
+    free(ptr);
+}
+#endif