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/imx8qxp_mek/spl.c b/board/freescale/imx8qxp_mek/spl.c
index eefee64..1ced8f7 100644
--- a/board/freescale/imx8qxp_mek/spl.c
+++ b/board/freescale/imx8qxp_mek/spl.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <image.h>
 #include <spl.h>
 #include <dm/uclass.h>
 #include <dm/device.h>