board: kobol: 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/kobol/helios4/helios4.c b/board/kobol/helios4/helios4.c
index 9c5b687..4c8407b 100644
--- a/board/kobol/helios4/helios4.c
+++ b/board/kobol/helios4/helios4.c
@@ -4,7 +4,7 @@
  *  based on board/solidrun/clearfog/clearfog.c
  */
 
-#include <common.h>
+#include <config.h>
 #include <i2c.h>
 #include <init.h>
 #include <miiphy.h>