fit: make sha256 support optional
sha256 has some beefy memory footprint.
Make it optional for constrained systems.
Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
diff --git a/include/configs/iocon.h b/include/configs/iocon.h
index 35ba1bd..ae05bcb 100644
--- a/include/configs/iocon.h
+++ b/include/configs/iocon.h
@@ -39,6 +39,7 @@
/* new uImage format support */
#define CONFIG_FIT
#define CONFIG_FIT_VERBOSE /* enable fit_format_{error,warning}() */
+#define CONFIG_FIT_DISABLE_SHA256
#define CONFIG_ENV_IS_IN_FLASH /* use FLASH for environment vars */