Added support for Gen3+ (Pins file only)

Added late z enable. (blddk request)
Only calculate look ahead if >2 moves in buffer.
Removed some FORCE_INLINE to save memory.

Signed-off-by: Erik van der Zalm <erik@vdzalm.eu>

Marlin/ultralcd.pde

@@ -59,7 +59,7 @@ void lcdProgMemprint(const char *str)
 //=============================functions         ============================
 //===========================================================================
 
-FORCE_INLINE int intround(const float &x){return int(0.5+x);}
+int intround(const float &x){return int(0.5+x);}
 
 void lcd_status(const char* message)
 {