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/include/asm-generic/u-boot.h b/include/asm-generic/u-boot.h
index cc94d39..6f74973 100644
--- a/include/asm-generic/u-boot.h
+++ b/include/asm-generic/u-boot.h
@@ -23,6 +23,7 @@
 
 #ifndef __ASSEMBLY__
 
+#include <asm/types.h>
 #include <linux/types.h>
 
 typedef struct bd_info {