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

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

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

board/highbank/ahci.c

@@ -3,7 +3,6 @@
  * Copyright 2012 Calxeda, Inc.
  */
 
-#include <common.h>
 #include <ahci.h>
 #include <asm/io.h>
 #include <linux/delay.h>

board/highbank/hb_sregs.c

@@ -10,7 +10,6 @@
  * Copyright (C) 2019 Arm Ltd.
  */
 
-#include <common.h>
 #include <dm.h>
 #include <dm/lists.h>
 

board/highbank/highbank.c

@@ -3,7 +3,6 @@
  * Copyright 2010-2011 Calxeda, Inc.
  */
 
-#include <common.h>
 #include <ahci.h>
 #include <cpu_func.h>
 #include <env.h>