common: Remove <common.h> and add needed includes

Remove <common.h> from all "commmon/" files and when needed add
missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>

common/ddr_spd.c

@@ -3,8 +3,8 @@
  * Copyright 2008-2014 Freescale Semiconductor, Inc.
  */
 
-#include <common.h>
 #include <ddr_spd.h>
+#include <stdio.h>
 
 /* used for ddr1 and ddr2 spd */
 static int