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/drivers/fastboot/fb_mmc.c b/drivers/fastboot/fb_mmc.c
index c666eb0..94fab4e 100644
--- a/drivers/fastboot/fb_mmc.c
+++ b/drivers/fastboot/fb_mmc.c
@@ -12,6 +12,7 @@
 #include <fb_mmc.h>
 #include <flash.h>
 #include <image-sparse.h>
+#include <image.h>
 #include <part.h>
 #include <mmc.h>
 #include <div64.h>