arm: aspeed: Remove <common.h> and add needed includes

Remove <common.h> from all mach-aspeed files and when needed add missing
include files directly.

Reviewed-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Signed-off-by: Tom Rini <trini@konsulko.com>

arch/arm/mach-aspeed/ast2500/board_common.c

@@ -2,7 +2,7 @@
 /*
  * Copyright (c) 2016 Google, Inc
  */
-#include <common.h>
+#include <config.h>
 #include <dm.h>
 #include <init.h>
 #include <log.h>

arch/arm/mach-aspeed/ast2500/clk_ast2500.c

@@ -3,7 +3,6 @@
  * Copyright (C) 2016 Google, Inc
  */
 
-#include <common.h>
 #include <dm.h>
 #include <asm/io.h>
 #include <asm/arch/scu_ast2500.h>

arch/arm/mach-aspeed/ast2600/board_common.c

@@ -2,7 +2,7 @@
 /*
  * Copyright (c) Aspeed Technology Inc.
  */
-#include <common.h>
+#include <config.h>
 #include <dm.h>
 #include <ram.h>
 #include <timer.h>

arch/arm/mach-aspeed/ast2600/spl.c

@@ -2,7 +2,6 @@
 /*
  * Copyright (c) Aspeed Technology Inc.
  */
-#include <common.h>
 #include <debug_uart.h>
 #include <dm.h>
 #include <spl.h>

arch/arm/mach-aspeed/ast_wdt.c

@@ -3,7 +3,6 @@
  * (C) Copyright 2016 Google, Inc
  */
 
-#include <common.h>
 #include <asm/io.h>
 #include <asm/arch/wdt.h>
 #include <linux/err.h>