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

Remove <common.h> from this board vendor directory and when needed
add missing include files directly.

Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tom Rini <trini@konsulko.com>

board/intel/slimbootloader/slimbootloader.c

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