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

Remove <common.h> from here and when needed add missing include files
directly.

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

examples/api/demo.c

@@ -5,7 +5,7 @@
  * Written by: Rafal Jaworowski <raj@semihalf.com>
  */
 
-#include <common.h>
+#include <stdio.h>
 #include <env.h>
 #include <linux/types.h>
 #include <api_public.h>

examples/api/glue.c

@@ -3,7 +3,6 @@
  * (C) Copyright 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com>
  */
 
-#include <common.h>
 #include <env.h>
 #include <linux/types.h>
 #include <api_public.h>

examples/api/libgenwrap.c

@@ -9,7 +9,6 @@
  * existing code e.g. operations on strings and similar.
  */
 
-#include <common.h>
 #include <command.h>
 #include <hang.h>
 #include <linux/delay.h>