We don't actually have a stdio.h header file. Our printf() functions are

defined in vsprintf.h.  (This may change, since vsprintf.h is a
non-standard name, but for now it's the one to use.)

There should be no need to include vsprintf.h just for DBG() statements,
since include/compiler.h forces it in for a debug build anyway.

src/arch/i386/core/load_buffer.c

@@ -1,4 +1,3 @@
-#include <stdio.h>
 #include "io.h"
 #include "load_buffer.h"
 

src/arch/i386/core/relocate.c

@@ -1,4 +1,3 @@
-#include <stdio.h>
 #include <io.h>
 #include <registers.h>
 #include <memmap.h>