[PATCH] kconfig: trivial cleanup

Replace all menu_add_prop mimicking menu_add_prompt with the latter func. I've
had to add a return value to menu_add_prompt for one usage.

I've rebuilt scripts/kconfig/zconf.tab.c_shipped by hand to reflect changes
in the source (I've not the same Bison version so regenerating it wouldn't
have been not a good idea), and compared it with what Roman itself did some
time ago, and it's the same.

So I guess this can be finally merged.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 8c59b21..5cfa6c4 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -136,9 +136,9 @@
 	return prop;
 }
 
-void menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
+struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 {
-	menu_add_prop(type, prompt, NULL, dep);
+	return menu_add_prop(type, prompt, NULL, dep);
 }
 
 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)