board: Seagate: 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: Tony Dinh <mibodhi@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/Seagate/dockstar/dockstar.c b/board/Seagate/dockstar/dockstar.c
index d72e3ef..e6ec00a 100644
--- a/board/Seagate/dockstar/dockstar.c
+++ b/board/Seagate/dockstar/dockstar.c
@@ -9,7 +9,6 @@
  * Marvell Semiconductor <www.marvell.com>
  */
 
-#include <common.h>
 #include <bootstage.h>
 #include <init.h>
 #include <netdev.h>
diff --git a/board/Seagate/goflexhome/goflexhome.c b/board/Seagate/goflexhome/goflexhome.c
index caea89c..b2d0ad8 100644
--- a/board/Seagate/goflexhome/goflexhome.c
+++ b/board/Seagate/goflexhome/goflexhome.c
@@ -12,7 +12,6 @@
  * Marvell Semiconductor <www.marvell.com>
  */
 
-#include <common.h>
 #include <bootstage.h>
 #include <init.h>
 #include <netdev.h>
diff --git a/board/Seagate/nas220/nas220.c b/board/Seagate/nas220/nas220.c
index cd2bbda..fa75532 100644
--- a/board/Seagate/nas220/nas220.c
+++ b/board/Seagate/nas220/nas220.c
@@ -8,7 +8,6 @@
  * Marvell Semiconductor <www.marvell.com>
  */
 
-#include <common.h>
 #include <init.h>
 #include <miiphy.h>
 #include <net.h>