More rambo fixes

Marlin/Marlin.pde

 #include "Configuration.h"
 #ifdef ULTRA_LCD
 #include <LiquidCrystal.h>
-#endif
+#endif
+#include <SPI.h>

Marlin/Marlin_main.cpp

  It has preliminary support for Matthew Roberts advance algorithm 
     http://reprap.org/pipermail/reprap-dev/2011-May/003323.html
  */
-#include <SPI.h>
+
 #include "Marlin.h"
 
 #include "ultralcd.h"
 #include "language.h"
 #include "pins_arduino.h"
 
+#if DIGIPOTSS_PIN > -1
+#include <SPI.h>
+#endif
+
 #define VERSION_STRING  "1.0.0"
 
 // look here for descriptions of gcodes: http://linuxcnc.org/handbook/gcode/g-code.html

Marlin/stepper.cpp

 #include "ultralcd.h"
 #include "language.h"
 #include "speed_lookuptable.h"
+#if DIGIPOTSS_PIN > -1
 #include <SPI.h>
+#endif
 
 
 //===========================================================================