ADD: 'mem' commands. For RDV40 devices only.

If you don't have one,  comment out inside client/Makefile this line

CFLAGS += -DWITH_FLASH

client/cmdflashmem.h

@@ -0,0 +1,32 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2018 iceman
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Proxmark3 RDV40 Flash memory commands
+//-----------------------------------------------------------------------------
+
+#ifndef CMDFLASHMEM_H__
+#define CMDFLASHMEM_H__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include "proxmark3.h"
+#include "ui.h"
+#include "cmdparser.h"
+#include "common.h"
+#include "util.h"
+#include "util_posix.h"			// msclock
+#include "loclass/fileutils.h"	//saveFile
+#include "cmdmain.h"			//getfromdevice
+
+extern int CmdFlashMem(const char *Cmd);
+
+extern int CmdFlashMemLoad(const char* cmd);
+extern int CmdFlashMemSave(const char* cmd);
+extern int CmdFlashMemWipe(const char *Cmd);
+#endif