x86: Remove <common.h> and add needed includes

Remove <common.h> from all x86 architecture files and when needed add
missing include files directly.

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

arch/x86/cpu/slimbootloader/slimbootloader.c

@@ -3,7 +3,6 @@
  * Copyright (C) 2019 Intel Corporation <www.intel.com>
  */
 
-#include <common.h>
 #include <cpu_func.h>
 #include <init.h>
 #include <log.h>