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/ti/am65x/evm.c b/board/ti/am65x/evm.c
index 9d96710..346f745 100644
--- a/board/ti/am65x/evm.c
+++ b/board/ti/am65x/evm.c
@@ -9,6 +9,8 @@
 
 #include <common.h>
 #include <dm.h>
+#include <fdt_support.h>
+#include <image.h>
 #include <init.h>
 #include <net.h>
 #include <asm/arch/sys_proto.h>