common: Drop image.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/freescale/t1040qds/eth.c b/board/freescale/t1040qds/eth.c
index 3f10e42..b349b77 100644
--- a/board/freescale/t1040qds/eth.c
+++ b/board/freescale/t1040qds/eth.c
@@ -10,6 +10,7 @@
  */
 
 #include <common.h>
+#include <fdt_support.h>
 #include <net.h>
 #include <netdev.h>
 #include <asm/fsl_serdes.h>