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

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

Acked-by: Michael Walle <michael@walle.cc>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/buffalo/lsxl/lsxl.c b/board/buffalo/lsxl/lsxl.c
index 6a866b5..1e501a0 100644
--- a/board/buffalo/lsxl/lsxl.c
+++ b/board/buffalo/lsxl/lsxl.c
@@ -7,7 +7,6 @@
  *   Marvell Semiconductor <www.marvell.com>
  */
 
-#include <common.h>
 #include <bootstage.h>
 #include <button.h>
 #include <command.h>