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>
diff --git a/arch/x86/cpu/qemu/dram.c b/arch/x86/cpu/qemu/dram.c
index d83abf0..6ac363f 100644
--- a/arch/x86/cpu/qemu/dram.c
+++ b/arch/x86/cpu/qemu/dram.c
@@ -3,11 +3,11 @@
  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
  */
 
-#include <common.h>
 #include <init.h>
 #include <asm/global_data.h>
 #include <asm/post.h>
 #include <asm/arch/qemu.h>
+#include <asm/u-boot.h>
 #include <linux/sizes.h>
 
 DECLARE_GLOBAL_DATA_PTR;