spl: spl_fit.c: enable check of signature for config node in spl/tpl

This commit add the support of signature check for config node
in spl/tpl when the function spl_load_simple_fit is used.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed