Add mb firmware slots

Core/py32f071xb.ld

@@ -134,10 +134,14 @@ SECTIONS
   _sidata = LOADADDR(.data);
 
   /* Initialized data sections goes into RAM, load LMA copy after code */
-  .data : 
+  .data :
   {
     . = ALIGN(4);
     _sdata = .;        /* create a global symbol at data start */
+
+    *(.RamFunc)        /* functions that must execute from RAM (e.g. internal */
+    *(.RamFunc*)       /* flash reprogramming); copied to RAM with .data      */
+
     *(.data)           /* .data sections */
     *(.data*)          /* .data* sections */