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

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

Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/firefly/firefly-rk3288/firefly-rk3288.c b/board/firefly/firefly-rk3288/firefly-rk3288.c
index 95d8b00..8e67ab4 100644
--- a/board/firefly/firefly-rk3288/firefly-rk3288.c
+++ b/board/firefly/firefly-rk3288/firefly-rk3288.c
@@ -3,7 +3,6 @@
  * (C) Copyright 2015 Google, Inc
  */
 
-#include <common.h>
 #include <hang.h>
 #include <led.h>
 #include <log.h>
diff --git a/board/firefly/firefly-rk3308/roc_cc_rk3308.c b/board/firefly/firefly-rk3308/roc_cc_rk3308.c
index af00250..404bdc6 100644
--- a/board/firefly/firefly-rk3308/roc_cc_rk3308.c
+++ b/board/firefly/firefly-rk3308/roc_cc_rk3308.c
@@ -3,7 +3,6 @@
  * (C) Copyright 2019 Rockchip Electronics Co., Ltd
  */
 
-#include <common.h>
 #include <adc.h>
 #include <asm/arch-rockchip/grf_rk3308.h>
 #include <asm/arch-rockchip/hardware.h>
diff --git a/board/firefly/roc-pc-rk3399/roc-pc-rk3399.c b/board/firefly/roc-pc-rk3399/roc-pc-rk3399.c
index 590519b..a149e4f 100644
--- a/board/firefly/roc-pc-rk3399/roc-pc-rk3399.c
+++ b/board/firefly/roc-pc-rk3399/roc-pc-rk3399.c
@@ -3,7 +3,6 @@
  * (C) Copyright 2016 Rockchip Electronics Co., Ltd
  */
 
-#include <common.h>
 #include <dm.h>
 #include <env.h>
 #include <log.h>