spl: add check for FIT-header when loading image

Add check for FDT_MAGIC, otherwise also legacy images will be loaded as
a FIT. With this check in place, the loader works correct both
with legacy and FIT images.

Signed-off-by: Tomas Melin <tomas.melin@vaisala.com>
Acked-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed