board: dfi: 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>
diff --git a/board/dfi/dfi-bt700/dfi-bt700.c b/board/dfi/dfi-bt700/dfi-bt700.c
index 87506a7..907cc98 100644
--- a/board/dfi/dfi-bt700/dfi-bt700.c
+++ b/board/dfi/dfi-bt700/dfi-bt700.c
@@ -3,7 +3,6 @@
  * Copyright (C) 2016 Stefan Roese <sr@denx.de>
  */
 
-#include <common.h>
 #include <init.h>
 #include <log.h>
 #include <nuvoton_nct6102d.h>