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/synopsys/hsdk/hsdk.c b/board/synopsys/hsdk/hsdk.c
index e32e782..e102d0f 100644
--- a/board/synopsys/hsdk/hsdk.c
+++ b/board/synopsys/hsdk/hsdk.c
@@ -8,6 +8,7 @@
 #include <config.h>
 #include <cpu_func.h>
 #include <env.h>
+#include <image.h>
 #include <init.h>
 #include <irq_func.h>
 #include <asm/cache.h>